72237530 has 24 divisors (see below), whose sum is σ = 131976756. Its totient is φ = 28468160.

The previous prime is 72237509. The next prime is 72237541. The reversal of 72237530 is 3573227.

It can be written as a sum of positive squares in 2 ways, for example, as 71385601 + 851929 = 8449^2 + 923^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72237493 and 72237502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49694 + ... + 51126.

Almost surely, 2^72237530 is an apocalyptic number.

72237530 is a deficient number, since it is larger than the sum of its proper divisors (59739226).

72237530 is a wasteful number, since it uses less digits than its factorization.

72237530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 72237530 is about 8499.2664389346. The cubic root of 72237530 is about 416.4737460675.

The spelling of 72237530 in words is "seventy-two million, two hundred thirty-seven thousand, five hundred thirty".