87477776 has 20 divisors (see below), whose sum is σ = 169695612. Its totient is φ = 43685376.

The previous prime is 87477757. The next prime is 87477779. The reversal of 87477776 is 67777478.

It can be written as a sum of positive squares in 2 ways, for example, as 13104400 + 74373376 = 3620^2 + 8624^2 .

It is a super-2 number, since 2×87477776² = 15304722587812352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87477779) 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, 12380 + ... + 18116.

Almost surely, 2^87477776 is an apocalyptic number.

It is an amenable number.

87477776 is a deficient number, since it is larger than the sum of its proper divisors (82217836).

87477776 is a wasteful number, since it uses less digits than its factorization.

87477776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6692 counting only the distinct ones).

The product of its digits is 3226944, while the sum is 53.

The square root of 87477776 is about 9352.9554687275. The cubic root of 87477776 is about 443.9144114439.

The spelling of 87477776 in words is "eighty-seven million, four hundred seventy-seven thousand, seven hundred seventy-six".