64728424 has 16 divisors (see below), whose sum is σ = 121479300. Its totient is φ = 32333952.

The previous prime is 64728409. The next prime is 64728439. The reversal of 64728424 is 42482746.

It is an interprime number because it is at equal distance from previous prime (64728409) and next prime (64728439).

It can be written as a sum of positive squares in 2 ways, for example, as 50665924 + 14062500 = 7118^2 + 3750^2 .

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, 7174 + ... + 13450.

Almost surely, 2^64728424 is an apocalyptic number.

It is an amenable number.

64728424 is a deficient number, since it is larger than the sum of its proper divisors (56750876).

64728424 is a wasteful number, since it uses less digits than its factorization.

64728424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572 (or 7568 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 64728424 is about 8045.3976906055. The cubic root of 64728424 is about 401.5118287358.

The spelling of 64728424 in words is "sixty-four million, seven hundred twenty-eight thousand, four hundred twenty-four".