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189644745 = 3512642983
BaseRepresentation
bin10110100110110…
…11111111001001
3111012211221200110
423103123333021
5342022112440
630452424533
74461645063
oct1323337711
9435757613
10189644745
119805a9a4
1253618149
133039cb34
141b288733
15119b1080
hexb4dbfc9

189644745 has 8 divisors (see below), whose sum is σ = 303431616. Its totient is φ = 101143856.

The previous prime is 189644737. The next prime is 189644753. The reversal of 189644745 is 547446981.

It is an interprime number because it is at equal distance from previous prime (189644737) and next prime (189644753).

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 189644745 - 23 = 189644737 is a prime.

It is a super-2 number, since 2×1896447452 = 71930258612230050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189644694 and 189644703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6321477 + ... + 6321506.

It is an arithmetic number, because the mean of its divisors is an integer number (37928952).

Almost surely, 2189644745 is an apocalyptic number.

189644745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189644745 is a deficient number, since it is larger than the sum of its proper divisors (113786871).

189644745 is a wasteful number, since it uses less digits than its factorization.

189644745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642991.

The product of its digits is 967680, while the sum is 48.

The square root of 189644745 is about 13771.1562695367. The cubic root of 189644745 is about 574.5311818167.

The spelling of 189644745 in words is "one hundred eighty-nine million, six hundred forty-four thousand, seven hundred forty-five".

Divisors: 1 3 5 15 12642983 37928949 63214915 189644745