78131332 has 6 divisors (see below), whose sum is σ = 136729838. Its totient is φ = 39065664.

The previous prime is 78131323. The next prime is 78131353. The reversal of 78131332 is 23313187.

It can be written as a sum of positive squares in only one way, i.e., 45481536 + 32649796 = 6744^2 + 5714^2 .

It is a super-2 number, since 2×78131332² = 12209010080188448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78131332.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9766413 + ... + 9766420.

Almost surely, 2^78131332 is an apocalyptic number.

It is an amenable number.

78131332 is a deficient number, since it is larger than the sum of its proper divisors (58598506).

78131332 is a wasteful number, since it uses less digits than its factorization.

78131332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19532837 (or 19532835 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 78131332 is about 8839.1929495854. The cubic root of 78131332 is about 427.5055357627.

The spelling of 78131332 in words is "seventy-eight million, one hundred thirty-one thousand, three hundred thirty-two".