78131316 has 48 divisors (see below), whose sum is σ = 187308800. Its totient is φ = 25339392.

The previous prime is 78131267. The next prime is 78131323. The reversal of 78131316 is 61313187.

It is a super-2 number, since 2×78131316² = 12209005079783712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68640 + ... + 69768.

Almost surely, 2^78131316 is an apocalyptic number.

It is an amenable number.

78131316 is an abundant number, since it is smaller than the sum of its proper divisors (109177484).

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

78131316 is a wasteful number, since it uses less digits than its factorization.

78131316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288 (or 1286 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 78131316 is about 8839.1920445253. The cubic root of 78131316 is about 427.5055065807.

The spelling of 78131316 in words is "seventy-eight million, one hundred thirty-one thousand, three hundred sixteen".