64731424 has 24 divisors (see below), whose sum is σ = 128057328. Its totient is φ = 32208960.

The previous prime is 64731413. The next prime is 64731449. The reversal of 64731424 is 42413746.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1959 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (5335722).

Almost surely, 2^64731424 is an apocalyptic number.

It is an amenable number.

64731424 is a deficient number, since it is larger than the sum of its proper divisors (63325904).

64731424 is a wasteful number, since it uses less digits than its factorization.

64731424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808 (or 9800 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 64731424 is about 8045.5841304407. The cubic root of 64731424 is about 401.5180316618.

The spelling of 64731424 in words is "sixty-four million, seven hundred thirty-one thousand, four hundred twenty-four".