72285786 has 12 divisors (see below), whose sum is σ = 156619242. Its totient is φ = 24095256.

The previous prime is 72285767. The next prime is 72285791. The reversal of 72285786 is 68758227.

72285786 is a `hidden beast` number, since 72 + 2 + 8 + 578 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 69205761 + 3080025 = 8319^2 + 1755^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2007921 + ... + 2007956.

Almost surely, 2^72285786 is an apocalyptic number.

72285786 is an abundant number, since it is smaller than the sum of its proper divisors (84333456).

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

72285786 is a wasteful number, since it uses less digits than its factorization.

72285786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015885 (or 4015882 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 72285786 is about 8502.1047982250. The cubic root of 72285786 is about 416.5664628018.

The spelling of 72285786 in words is "seventy-two million, two hundred eighty-five thousand, seven hundred eighty-six".