78683136 has 88 divisors (see below), whose sum is σ = 239744640. Its totient is φ = 22474752.

The previous prime is 78683117. The next prime is 78683147. The reversal of 78683136 is 63138687.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

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, 19675 + ... + 23333.

Almost surely, 2^78683136 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 78683136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119872320).

78683136 is an abundant number, since it is smaller than the sum of its proper divisors (161061504).

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

78683136 is a wasteful number, since it uses less digits than its factorization.

78683136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689 (or 3671 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 78683136 is about 8870.3515150190. The cubic root of 78683136 is about 428.5095976831.

The spelling of 78683136 in words is "seventy-eight million, six hundred eighty-three thousand, one hundred thirty-six".