72805890 has 16 divisors (see below), whose sum is σ = 174734208. Its totient is φ = 19414896.

The previous prime is 72805877. The next prime is 72805907. The reversal of 72805890 is 9850827.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213402 + ... + 1213461.

It is an arithmetic number, because the mean of its divisors is an integer number (10920888).

Almost surely, 2^72805890 is an apocalyptic number.

72805890 is an abundant number, since it is smaller than the sum of its proper divisors (101928318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72805890 is a wasteful number, since it uses less digits than its factorization.

72805890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426873.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 72805890 is about 8532.6367554233. The cubic root of 72805890 is about 417.5631563295.

The spelling of 72805890 in words is "seventy-two million, eight hundred five thousand, eight hundred ninety".