72556530 has 32 divisors (see below), whose sum is σ = 174714624. Its totient is φ = 19284096.

The previous prime is 72556529. The next prime is 72556537. The reversal of 72556530 is 3565527.

It is a junction number, because it is equal to n+sod(n) for n = 72556491 and 72556500.

It is not an unprimeable number, because it can be changed into a prime (72556537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5527 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (5459832).

Almost surely, 2^72556530 is an apocalyptic number.

72556530 is an abundant number, since it is smaller than the sum of its proper divisors (102158094).

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

72556530 is a wasteful number, since it uses less digits than its factorization.

72556530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050.

The product of its (nonzero) digits is 31500, while the sum is 33.

The square root of 72556530 is about 8518.0120920318. The cubic root of 72556530 is about 417.0858934337.

The spelling of 72556530 in words is "seventy-two million, five hundred fifty-six thousand, five hundred thirty".