64392172 has 48 divisors (see below), whose sum is σ = 124975872. Its totient is φ = 28848960.

The previous prime is 64392143. The next prime is 64392193. The reversal of 64392172 is 27129346.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394963 + ... + 395125.

It is an arithmetic number, because the mean of its divisors is an integer number (2603664).

Almost surely, 2^64392172 is an apocalyptic number.

It is an amenable number.

64392172 is a deficient number, since it is larger than the sum of its proper divisors (60583700).

64392172 is a wasteful number, since it uses less digits than its factorization.

64392172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 356 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 64392172 is about 8024.4733160501. The cubic root of 64392172 is about 400.8153618334.

The spelling of 64392172 in words is "sixty-four million, three hundred ninety-two thousand, one hundred seventy-two".