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64261972 = 22174720107
BaseRepresentation
bin1111010100100…
…0111101010100
311110220211212001
43311020331110
5112422340342
610213205044
71410134455
oct365107524
9143824761
1064261972
1133301a75
1219630784
131040cb48
14876b12c
1559958b7
hex3d48f54

64261972 has 24 divisors (see below), whose sum is σ = 121613184. Its totient is φ = 29596032.

The previous prime is 64261961. The next prime is 64261987. The reversal of 64261972 is 27916246.

It is a congruent number.

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, 6858 + ... + 13249.

It is an arithmetic number, because the mean of its divisors is an integer number (5067216).

Almost surely, 264261972 is an apocalyptic number.

It is an amenable number.

64261972 is a deficient number, since it is larger than the sum of its proper divisors (57351212).

64261972 is a wasteful number, since it uses less digits than its factorization.

64261972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20175 (or 20173 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 64261972 is about 8016.3565289974. The cubic root of 64261972 is about 400.5450320130.

The spelling of 64261972 in words is "sixty-four million, two hundred sixty-one thousand, nine hundred seventy-two".

Divisors: 1 2 4 17 34 47 68 94 188 799 1598 3196 20107 40214 80428 341819 683638 945029 1367276 1890058 3780116 16065493 32130986 64261972