64938672 has 100 divisors (see below), whose sum is σ = 190400760. Its totient is φ = 21364992.

The previous prime is 64938661. The next prime is 64938689. The reversal of 64938672 is 27683946.

It is a super-2 number, since 2×64938672² = 8434062242247168, which contains 22 as substring.

Its product of digits (435456) is a multiple of the sum of its prime factors (672).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 115063 + ... + 115625.

Almost surely, 2^64938672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64938672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95200380).

64938672 is an abundant number, since it is smaller than the sum of its proper divisors (125462088).

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

64938672 is a wasteful number, since it uses less digits than its factorization.

64938672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 657 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 64938672 is about 8058.4534496391. The cubic root of 64938672 is about 401.9460832122.

The spelling of 64938672 in words is "sixty-four million, nine hundred thirty-eight thousand, six hundred seventy-two".