72818806 has 4 divisors (see below), whose sum is σ = 109228212. Its totient is φ = 36409402.

The previous prime is 72818789. The next prime is 72818813. The reversal of 72818806 is 60881827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18204700 + ... + 18204703.

It is an arithmetic number, because the mean of its divisors is an integer number (27307053).

Almost surely, 2^72818806 is an apocalyptic number.

72818806 is a deficient number, since it is larger than the sum of its proper divisors (36409406).

72818806 is a wasteful number, since it uses less digits than its factorization.

72818806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36409405.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 72818806 is about 8533.3935805165. The cubic root of 72818806 is about 417.5878472203.

The spelling of 72818806 in words is "seventy-two million, eight hundred eighteen thousand, eight hundred six".