72013866 has 16 divisors (see below), whose sum is σ = 146469600. Its totient is φ = 23597648.

The previous prime is 72013849. The next prime is 72013891. The reversal of 72013866 is 66831027.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101361 + ... + 102068.

It is an arithmetic number, because the mean of its divisors is an integer number (9154350).

Almost surely, 2^72013866 is an apocalyptic number.

72013866 is an abundant number, since it is smaller than the sum of its proper divisors (74455734).

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

72013866 is a wasteful number, since it uses less digits than its factorization.

72013866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203493.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 72013866 is about 8486.0983967899. The cubic root of 72013866 is about 416.0434688613.

The spelling of 72013866 in words is "seventy-two million, thirteen thousand, eight hundred sixty-six".