78371136 has 84 divisors (see below), whose sum is σ = 225856800. Its totient is φ = 25982208.

The previous prime is 78371123. The next prime is 78371141. The reversal of 78371136 is 63117387.

It is a super-2 number, since 2×78371136² = 12284069915860992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (21168) is a multiple of the sum of its prime factors (756).

It is a self number, because there is not a number n which added to its sum of digits gives 78371136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206595 + ... + 206973.

Almost surely, 2^78371136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78371136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112928400).

78371136 is an abundant number, since it is smaller than the sum of its proper divisors (147485664).

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

78371136 is a wasteful number, since it uses less digits than its factorization.

78371136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 743 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 78371136 is about 8852.7473701671. The cubic root of 78371136 is about 427.9424617676.

The spelling of 78371136 in words is "seventy-eight million, three hundred seventy-one thousand, one hundred thirty-six".