87989896 has 8 divisors (see below), whose sum is σ = 164981070. Its totient is φ = 43994944.

The previous prime is 87989879. The next prime is 87989903. The reversal of 87989896 is 69898978.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 16924996 = 8430^2 + 4114^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499361 + ... + 5499376.

Almost surely, 2^87989896 is an apocalyptic number.

It is an amenable number.

87989896 is a deficient number, since it is larger than the sum of its proper divisors (76991174).

87989896 is a wasteful number, since it uses less digits than its factorization.

87989896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10998743 (or 10998739 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 64.

The square root of 87989896 is about 9380.2929591778. The cubic root of 87989896 is about 444.7789939056.

The spelling of 87989896 in words is "eighty-seven million, nine hundred eighty-nine thousand, eight hundred ninety-six".