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389000172 = 223116148311
BaseRepresentation
bin10111001011111…
…010101111101100
31000002222020220210
4113023322233230
51244041001142
6102333342420
712432306201
oct2713725754
91002866823
10389000172
1118a642650
12aa337a10
136278c922
143993dca8
152423e49c
hex172fabec

389000172 has 48 divisors (see below), whose sum is σ = 1006435584. Its totient is φ = 115944000.

The previous prime is 389000119. The next prime is 389000179. The reversal of 389000172 is 271000983.

It is a happy number.

It is a super-2 number, since 2×3890001722 = 302642267632059168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (389000179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16104 + ... + 32207.

It is an arithmetic number, because the mean of its divisors is an integer number (20967408).

Almost surely, 2389000172 is an apocalyptic number.

389000172 is the 16104-th pentagonal number.

It is an amenable number.

389000172 is an abundant number, since it is smaller than the sum of its proper divisors (617435412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389000172 is a wasteful number, since it uses less digits than its factorization.

389000172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48390 (or 48388 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 389000172 is about 19723.0872836886. The cubic root of 389000172 is about 729.9894737958.

The spelling of 389000172 in words is "three hundred eighty-nine million, one hundred seventy-two", and thus it is an aban number.

Divisors: 1 2 3 4 6 11 12 22 33 44 61 66 122 132 183 244 366 671 732 1342 2013 2684 4026 8052 48311 96622 144933 193244 289866 531421 579732 1062842 1594263 2125684 2946971 3188526 5893942 6377052 8840913 11787884 17681826 32416681 35363652 64833362 97250043 129666724 194500086 389000172