72857572 has 6 divisors (see below), whose sum is σ = 127500758. Its totient is φ = 36428784.

The previous prime is 72857557. The next prime is 72857579. The reversal of 72857572 is 27575827.

It can be written as a sum of positive squares in only one way, i.e., 57365476 + 15492096 = 7574^2 + 3936^2 .

It is a super-3 number, since 3×72857572³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72857579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9107193 + ... + 9107200.

Almost surely, 2^72857572 is an apocalyptic number.

It is an amenable number.

72857572 is a deficient number, since it is larger than the sum of its proper divisors (54643186).

72857572 is a wasteful number, since it uses less digits than its factorization.

72857572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18214397 (or 18214395 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 72857572 is about 8535.6647075667. The cubic root of 72857572 is about 417.6619367747.

The spelling of 72857572 in words is "seventy-two million, eight hundred fifty-seven thousand, five hundred seventy-two".