77982836 has 6 divisors (see below), whose sum is σ = 136469970. Its totient is φ = 38991416.

The previous prime is 77982833. The next prime is 77982847. The reversal of 77982836 is 63828977.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58675600 + 19307236 = 7660^2 + 4394^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77982833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747851 + ... + 9747858.

It is an arithmetic number, because the mean of its divisors is an integer number (22744995).

Almost surely, 2^77982836 is an apocalyptic number.

It is an amenable number.

77982836 is a deficient number, since it is larger than the sum of its proper divisors (58487134).

77982836 is a wasteful number, since it uses less digits than its factorization.

77982836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19495713 (or 19495711 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 77982836 is about 8830.7890927142. The cubic root of 77982836 is about 427.2345257367.

The spelling of 77982836 in words is "seventy-seven million, nine hundred eighty-two thousand, eight hundred thirty-six".