78135976 has 16 divisors (see below), whose sum is σ = 151557300. Its totient is φ = 37720704.

The previous prime is 78135943. The next prime is 78135979. The reversal of 78135976 is 67953187.

It can be written as a sum of positive squares in 2 ways, for example, as 73513476 + 4622500 = 8574^2 + 2150^2 .

It is a super-2 number, since 2×78135976² = 12210461490945152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78135979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168165 + ... + 168628.

Almost surely, 2^78135976 is an apocalyptic number.

It is an amenable number.

78135976 is a deficient number, since it is larger than the sum of its proper divisors (73421324).

78135976 is a wasteful number, since it uses less digits than its factorization.

78135976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336828 (or 336824 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 78135976 is about 8839.4556393479. The cubic root of 78135976 is about 427.5140056741.

The spelling of 78135976 in words is "seventy-eight million, one hundred thirty-five thousand, nine hundred seventy-six".