87988978 has 32 divisors (see below), whose sum is σ = 166209408. Its totient is φ = 33936000.

The previous prime is 87988949. The next prime is 87989009.

87988978 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12726 + ... + 18382.

It is an arithmetic number, because the mean of its divisors is an integer number (5194044).

Almost surely, 2^87988978 is an apocalyptic number.

87988978 is a deficient number, since it is larger than the sum of its proper divisors (78220430).

87988978 is a wasteful number, since it uses less digits than its factorization.

87988978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5778.

The product of its digits is 16257024, while the sum is 64.

The square root of 87988978 is about 9380.2440266765. The cubic root of 87988978 is about 444.7774471047. Note that the first 3 decimals are identical.

The spelling of 87988978 in words is "eighty-seven million, nine hundred eighty-eight thousand, nine hundred seventy-eight".