87993128 has 32 divisors (see below), whose sum is σ = 171072000. Its totient is φ = 42386880.

The previous prime is 87993121. The next prime is 87993133. The reversal of 87993128 is 82139978.

It is not an unprimeable number, because it can be changed into a prime (87993121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66053 + ... + 67371.

It is an arithmetic number, because the mean of its divisors is an integer number (5346000).

Almost surely, 2^87993128 is an apocalyptic number.

It is an amenable number.

87993128 is a deficient number, since it is larger than the sum of its proper divisors (83078872).

87993128 is a wasteful number, since it uses less digits than its factorization.

87993128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1625 (or 1621 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 87993128 is about 9380.4652336651. The cubic root of 87993128 is about 444.7844396373.

The spelling of 87993128 in words is "eighty-seven million, nine hundred ninety-three thousand, one hundred twenty-eight".