72289628 has 12 divisors (see below), whose sum is σ = 127689912. Its totient is φ = 35806800.

The previous prime is 72289577. The next prime is 72289643. The reversal of 72289628 is 82698227.

It is a super-3 number, since 3×72289628³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84023 + ... + 84878.

It is an arithmetic number, because the mean of its divisors is an integer number (10640826).

Almost surely, 2^72289628 is an apocalyptic number.

It is an amenable number.

72289628 is a deficient number, since it is larger than the sum of its proper divisors (55400284).

72289628 is a wasteful number, since it uses less digits than its factorization.

72289628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169012 (or 169010 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 72289628 is about 8502.3307392738. The cubic root of 72289628 is about 416.5738428603.

The spelling of 72289628 in words is "seventy-two million, two hundred eighty-nine thousand, six hundred twenty-eight".