72690208 has 12 divisors (see below), whose sum is σ = 143108910. Its totient is φ = 36345088.

The previous prime is 72690187. The next prime is 72690217. The reversal of 72690208 is 80209627.

It can be written as a sum of positive squares in only one way, i.e., 67436944 + 5253264 = 8212^2 + 2292^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1135753 + ... + 1135816.

Almost surely, 2^72690208 is an apocalyptic number.

It is an amenable number.

72690208 is a deficient number, since it is larger than the sum of its proper divisors (70418702).

72690208 is a wasteful number, since it uses less digits than its factorization.

72690208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271579 (or 2271571 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 72690208 is about 8525.8552650159. The cubic root of 72690208 is about 417.3418823478.

The spelling of 72690208 in words is "seventy-two million, six hundred ninety thousand, two hundred eight".