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28358197 = 723317387
BaseRepresentation
bin110110000101…
…1011000110101
31222100202010121
41230023120311
524224430242
62451451541
7463016650
oct154133065
958322117
1028358197
1115009a2a
1295b6bb1
135b4b8ca
143aa2897
152752667
hex1b0b635

28358197 has 8 divisors (see below), whose sum is σ = 32550336. Its totient is φ = 24201312.

The previous prime is 28358191. The next prime is 28358257. The reversal of 28358197 is 79185382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28358197 - 211 = 28356149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28358191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7063 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (4068792).

Almost surely, 228358197 is an apocalyptic number.

It is an amenable number.

28358197 is a deficient number, since it is larger than the sum of its proper divisors (4192139).

28358197 is a wasteful number, since it uses less digits than its factorization.

28358197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17627.

The product of its digits is 120960, while the sum is 43.

The square root of 28358197 is about 5325.2414968713. The cubic root of 28358197 is about 304.9482918702.

The spelling of 28358197 in words is "twenty-eight million, three hundred fifty-eight thousand, one hundred ninety-seven".

Divisors: 1 7 233 1631 17387 121709 4051171 28358197