72851724 has 60 divisors (see below), whose sum is σ = 207772488. Its totient is φ = 22075200.

The previous prime is 72851717. The next prime is 72851743. The reversal of 72851724 is 42715827.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6657 + ... + 13784.

Almost surely, 2^72851724 is an apocalyptic number.

It is an amenable number.

72851724 is an abundant number, since it is smaller than the sum of its proper divisors (134920764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72851724 is a wasteful number, since it uses less digits than its factorization.

72851724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20468 (or 20457 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 72851724 is about 8535.3221380332. The cubic root of 72851724 is about 417.6507617644.

It can be divided in two parts, 7285 and 1724, that added together give a palindrome (9009).

The spelling of 72851724 in words is "seventy-two million, eight hundred fifty-one thousand, seven hundred twenty-four".