87977544 has 16 divisors (see below), whose sum is σ = 219943920. Its totient is φ = 29325840.

The previous prime is 87977537. The next prime is 87977551. The reversal of 87977544 is 44577978.

It is an interprime number because it is at equal distance from previous prime (87977537) and next prime (87977551).

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, 1832842 + ... + 1832889.

It is an arithmetic number, because the mean of its divisors is an integer number (13746495).

Almost surely, 2^87977544 is an apocalyptic number.

It is an amenable number.

87977544 is an abundant number, since it is smaller than the sum of its proper divisors (131966376).

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

87977544 is a wasteful number, since it uses less digits than its factorization.

87977544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665740 (or 3665736 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 51.

The square root of 87977544 is about 9379.6345344582. The cubic root of 87977544 is about 444.7581802763.

The spelling of 87977544 in words is "eighty-seven million, nine hundred seventy-seven thousand, five hundred forty-four".