72878086 has 16 divisors (see below), whose sum is σ = 115896960. Its totient is φ = 34309440.

The previous prime is 72878041. The next prime is 72878087. The reversal of 72878086 is 68087827.

It is a super-2 number, since 2×72878086² = 10622430838046792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72878087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13591 + ... + 18178.

It is an arithmetic number, because the mean of its divisors is an integer number (7243560).

Almost surely, 2^72878086 is an apocalyptic number.

72878086 is a deficient number, since it is larger than the sum of its proper divisors (43018874).

72878086 is a wasteful number, since it uses less digits than its factorization.

72878086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31839.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 72878086 is about 8536.8662868760. The cubic root of 72878086 is about 417.7011324855.

The spelling of 72878086 in words is "seventy-two million, eight hundred seventy-eight thousand, eighty-six".