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645632204 = 227139165887
BaseRepresentation
bin100110011110111…
…001000011001100
31122222212111212212
4212132321003030
52310240212304
6144022045552
721666532430
oct4636710314
91588774785
10645632204
11301496038
121602798b8
13a39b4bb9
1461a649c0
153ba3366e
hex267b90cc

645632204 has 24 divisors (see below), whose sum is σ = 1300561920. Its totient is φ = 274707216.

The previous prime is 645632177. The next prime is 645632209. The reversal of 645632204 is 402236546.

645632204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with 654929715 it forms a betrothed pair.

It is a super-3 number, since 3×6456322043 (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (645632209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79052 + ... + 86835.

It is an arithmetic number, because the mean of its divisors is an integer number (54190080).

Almost surely, 2645632204 is an apocalyptic number.

It is an amenable number.

645632204 is an abundant number, since it is smaller than the sum of its proper divisors (654929716).

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

645632204 is a wasteful number, since it uses less digits than its factorization.

645632204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166037 (or 166035 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 645632204 is about 25409.2936540944. The cubic root of 645632204 is about 864.2944580340.

The spelling of 645632204 in words is "six hundred forty-five million, six hundred thirty-two thousand, two hundred four".

Divisors: 1 2 4 7 14 28 139 278 556 973 1946 3892 165887 331774 663548 1161209 2322418 4644836 23058293 46116586 92233172 161408051 322816102 645632204