72643576 has 16 divisors (see below), whose sum is σ = 139105440. Its totient is φ = 35548800.

The previous prime is 72643559. The next prime is 72643607. The reversal of 72643576 is 67534627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96225 + ... + 96976.

It is an arithmetic number, because the mean of its divisors is an integer number (8694090).

Almost surely, 2^72643576 is an apocalyptic number.

It is an amenable number.

72643576 is a deficient number, since it is larger than the sum of its proper divisors (66461864).

72643576 is a wasteful number, since it uses less digits than its factorization.

72643576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193254 (or 193250 counting only the distinct ones).

The product of its digits is 211680, while the sum is 40.

The square root of 72643576 is about 8523.1200859779. The cubic root of 72643576 is about 417.2526192944.

The spelling of 72643576 in words is "seventy-two million, six hundred forty-three thousand, five hundred seventy-six".