77678152 has 16 divisors (see below), whose sum is σ = 145766700. Its totient is φ = 38807040.

The previous prime is 77678147. The next prime is 77678177. The reversal of 77678152 is 25187677.

It can be written as a sum of positive squares in 2 ways, for example, as 76842756 + 835396 = 8766^2 + 914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77678099 and 77678108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8652 + ... + 15172.

Almost surely, 2^77678152 is an apocalyptic number.

It is an amenable number.

77678152 is a deficient number, since it is larger than the sum of its proper divisors (68088548).

77678152 is a wasteful number, since it uses less digits than its factorization.

77678152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016 (or 8012 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The square root of 77678152 is about 8813.5209763181. The cubic root of 77678152 is about 426.6773885109.

The spelling of 77678152 in words is "seventy-seven million, six hundred seventy-eight thousand, one hundred fifty-two".