72700724 has 12 divisors (see below), whose sum is σ = 128538564. Its totient is φ = 35975424.

The previous prime is 72700717. The next prime is 72700757. The reversal of 72700724 is 42700727.

It can be written as a sum of positive squares in 2 ways, for example, as 35880100 + 36820624 = 5990^2 + 6068^2 .

It is a super-4 number, since 4×72700724⁴ (a number of 33 digits) contains 4444 as substring.

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, 93299 + ... + 94074.

It is an arithmetic number, because the mean of its divisors is an integer number (10711547).

Almost surely, 2^72700724 is an apocalyptic number.

It is an amenable number.

72700724 is a deficient number, since it is larger than the sum of its proper divisors (55837840).

72700724 is a wasteful number, since it uses less digits than its factorization.

72700724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187474 (or 187472 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 72700724 is about 8526.4719550351. The cubic root of 72700724 is about 417.3620068173.

The spelling of 72700724 in words is "seventy-two million, seven hundred thousand, seven hundred twenty-four".