78150872 has 32 divisors (see below), whose sum is σ = 153468000. Its totient is φ = 37238784.

The previous prime is 78150851. The next prime is 78150899. The reversal of 78150872 is 27805187.

It is a super-2 number, since 2×78150872² = 12215117588720768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63608 + ... + 64824.

It is an arithmetic number, because the mean of its divisors is an integer number (4795875).

Almost surely, 2^78150872 is an apocalyptic number.

It is an amenable number.

78150872 is a deficient number, since it is larger than the sum of its proper divisors (75317128).

78150872 is a wasteful number, since it uses less digits than its factorization.

78150872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 78150872 is about 8840.2981850162. The cubic root of 78150872 is about 427.5411713252.

The spelling of 78150872 in words is "seventy-eight million, one hundred fifty thousand, eight hundred seventy-two".