72878858 has 32 divisors (see below), whose sum is σ = 125508096. Its totient is φ = 31477248.

The previous prime is 72878857. The next prime is 72878867. The reversal of 72878858 is 85887827.

It is a happy number.

It is a super-2 number, since 2×72878858² = 10622655886768328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72878857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26810 + ... + 29402.

It is an arithmetic number, because the mean of its divisors is an integer number (3922128).

Almost surely, 2^72878858 is an apocalyptic number.

72878858 is a deficient number, since it is larger than the sum of its proper divisors (52629238).

72878858 is a wasteful number, since it uses less digits than its factorization.

72878858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678.

The product of its digits is 2007040, while the sum is 53.

The square root of 72878858 is about 8536.9115024112. The cubic root of 72878858 is about 417.7026073876.

The spelling of 72878858 in words is "seventy-two million, eight hundred seventy-eight thousand, eight hundred fifty-eight".