72575220 has 24 divisors (see below), whose sum is σ = 203210784. Its totient is φ = 19353376.

The previous prime is 72575219. The next prime is 72575233. The reversal of 72575220 is 2257527.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 604734 + ... + 604853.

It is an arithmetic number, because the mean of its divisors is an integer number (8467116).

Almost surely, 2^72575220 is an apocalyptic number.

It is an amenable number.

72575220 is an abundant number, since it is smaller than the sum of its proper divisors (130635564).

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

72575220 is a wasteful number, since it uses less digits than its factorization.

72575220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209599 (or 1209597 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72575220 is about 8519.1091083516. The cubic root of 72575220 is about 417.1217030574.

The spelling of 72575220 in words is "seventy-two million, five hundred seventy-five thousand, two hundred twenty".