64120724 has 12 divisors (see below), whose sum is σ = 112308084. Its totient is φ = 32032704.

The previous prime is 64120717. The next prime is 64120733. The reversal of 64120724 is 42702146.

It can be written as a sum of positive squares in 2 ways, for example, as 57002500 + 7118224 = 7550^2 + 2668^2 .

It is a super-2 number, since 2×64120724² = 8222934492568352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64120693 and 64120702.

It is a congruent number.

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, 1169 + ... + 11384.

It is an arithmetic number, because the mean of its divisors is an integer number (9359007).

Almost surely, 2^64120724 is an apocalyptic number.

It is an amenable number.

64120724 is a deficient number, since it is larger than the sum of its proper divisors (48187360).

64120724 is a wasteful number, since it uses less digits than its factorization.

64120724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13834 (or 13832 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 64120724 is about 8007.5416951771. The cubic root of 64120724 is about 400.2513503577.

The spelling of 64120724 in words is "sixty-four million, one hundred twenty thousand, seven hundred twenty-four".