64472690 has 16 divisors (see below), whose sum is σ = 117521280. Its totient is φ = 25462320.

The previous prime is 64472671. The next prime is 64472701. The reversal of 64472690 is 9627446.

It is a super-2 number, since 2×64472690² = 8313455511672200, which contains 22 as substring.

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, 40016 + ... + 41595.

It is an arithmetic number, because the mean of its divisors is an integer number (7345080).

Almost surely, 2^64472690 is an apocalyptic number.

64472690 is a deficient number, since it is larger than the sum of its proper divisors (53048590).

64472690 is a wasteful number, since it uses less digits than its factorization.

64472690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81697.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 64472690 is about 8029.4887757565. The cubic root of 64472690 is about 400.9823562986.

The spelling of 64472690 in words is "sixty-four million, four hundred seventy-two thousand, six hundred ninety".