77932836 has 18 divisors (see below), whose sum is σ = 196996982. Its totient is φ = 25977600.

The previous prime is 77932819. The next prime is 77932837. The reversal of 77932836 is 63823977.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 30735936 = 6870^2 + 5544^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 77932791 and 77932800.

It is not an unprimeable number, because it can be changed into a prime (77932837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1082365 + ... + 1082436.

Almost surely, 2^77932836 is an apocalyptic number.

It is an amenable number.

77932836 is an abundant number, since it is smaller than the sum of its proper divisors (119064146).

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

77932836 is a wasteful number, since it uses less digits than its factorization.

77932836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164811 (or 2164806 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 77932836 is about 8827.9576346967. The cubic root of 77932836 is about 427.1431966935.

The spelling of 77932836 in words is "seventy-seven million, nine hundred thirty-two thousand, eight hundred thirty-six".