64893872 has 20 divisors (see below), whose sum is σ = 125891496. Its totient is φ = 32405760.

The previous prime is 64893869. The next prime is 64893877. The reversal of 64893872 is 27839846.

It is a super-2 number, since 2×64893872² = 8422429246304768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64893877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13448 + ... + 17624.

Almost surely, 2^64893872 is an apocalyptic number.

It is an amenable number.

64893872 is a deficient number, since it is larger than the sum of its proper divisors (60997624).

64893872 is a wasteful number, since it uses less digits than its factorization.

64893872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156 (or 5150 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 64893872 is about 8055.6732803658. The cubic root of 64893872 is about 401.8536302023.

The spelling of 64893872 in words is "sixty-four million, eight hundred ninety-three thousand, eight hundred seventy-two".