72690224 has 10 divisors (see below), whose sum is σ = 140837340. Its totient is φ = 36345104.

The previous prime is 72690217. The next prime is 72690227. The reversal of 72690224 is 42209627.

It is not an unprimeable number, because it can be changed into a prime (72690227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2271554 + ... + 2271585.

It is an arithmetic number, because the mean of its divisors is an integer number (14083734).

Almost surely, 2^72690224 is an apocalyptic number.

It is an amenable number.

72690224 is a deficient number, since it is larger than the sum of its proper divisors (68147116).

72690224 is a wasteful number, since it uses less digits than its factorization.

72690224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4543147 (or 4543141 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 72690224 is about 8525.8562033382. The cubic root of 72690224 is about 417.3419129685.

The spelling of 72690224 in words is "seventy-two million, six hundred ninety thousand, two hundred twenty-four".