72302166 has 32 divisors (see below), whose sum is σ = 161169120. Its totient is φ = 24026112.

The previous prime is 72302159. The next prime is 72302177. The reversal of 72302166 is 66120327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17166 + ... + 20958.

It is an arithmetic number, because the mean of its divisors is an integer number (5036535).

Almost surely, 2^72302166 is an apocalyptic number.

72302166 is an abundant number, since it is smaller than the sum of its proper divisors (88866954).

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

72302166 is a wasteful number, since it uses less digits than its factorization.

72302166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4151 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 72302166 is about 8503.0680345391. The cubic root of 72302166 is about 416.5979251575.

The spelling of 72302166 in words is "seventy-two million, three hundred two thousand, one hundred sixty-six".