87774916 has 6 divisors (see below), whose sum is σ = 153606110. Its totient is φ = 43887456.

The previous prime is 87774887. The next prime is 87774917. The reversal of 87774916 is 61947778.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 8386816 = 8910^2 + 2896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87774916.

It is not an unprimeable number, because it can be changed into a prime (87774917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10971861 + ... + 10971868.

Almost surely, 2^87774916 is an apocalyptic number.

It is an amenable number.

87774916 is a deficient number, since it is larger than the sum of its proper divisors (65831194).

87774916 is a wasteful number, since it uses less digits than its factorization.

87774916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21943733 (or 21943731 counting only the distinct ones).

The product of its digits is 592704, while the sum is 49.

The square root of 87774916 is about 9368.8268208992. The cubic root of 87774916 is about 444.4164652850.

The spelling of 87774916 in words is "eighty-seven million, seven hundred seventy-four thousand, nine hundred sixteen".