72858172 has 12 divisors (see below), whose sum is σ = 127562680. Its totient is φ = 36411696.

The previous prime is 72858151. The next prime is 72858173. The reversal of 72858172 is 27185827.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72858173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11479 + ... + 16657.

Almost surely, 2^72858172 is an apocalyptic number.

It is an amenable number.

72858172 is a deficient number, since it is larger than the sum of its proper divisors (54704508).

72858172 is a wasteful number, since it uses less digits than its factorization.

72858172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8700 (or 8698 counting only the distinct ones).

The product of its digits is 62720, while the sum is 40.

The square root of 72858172 is about 8535.6998541420. The cubic root of 72858172 is about 417.6630832877.

The spelling of 72858172 in words is "seventy-two million, eight hundred fifty-eight thousand, one hundred seventy-two".