78907136 has 72 divisors (see below), whose sum is σ = 196420224. Its totient is φ = 30735360.

The previous prime is 78907117. The next prime is 78907141. The reversal of 78907136 is 63170987.

It is a super-2 number, since 2×78907136² = 12452672223444992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78907093 and 78907102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17711 + ... + 21713.

Almost surely, 2^78907136 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 78907136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98210112).

78907136 is an abundant number, since it is smaller than the sum of its proper divisors (117513088).

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

78907136 is a wasteful number, since it uses less digits than its factorization.

78907136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037 (or 4023 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 78907136 is about 8882.9688730739. The cubic root of 78907136 is about 428.9158482561.

The spelling of 78907136 in words is "seventy-eight million, nine hundred seven thousand, one hundred thirty-six".