72959886 has 128 divisors (see below), whose sum is σ = 186624000. Its totient is φ = 20984832.

The previous prime is 72959881. The next prime is 72959891. The reversal of 72959886 is 68895927.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72959881) and next prime (72959891).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72959881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 819730 + ... + 819818.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^72959886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72959886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93312000).

72959886 is an abundant number, since it is smaller than the sum of its proper divisors (113664114).

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

72959886 is a wasteful number, since it uses less digits than its factorization.

72959886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 177 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 72959886 is about 8541.6559284485. The cubic root of 72959886 is about 417.8573530947.

The spelling of 72959886 in words is "seventy-two million, nine hundred fifty-nine thousand, eight hundred eighty-six".