89978900 has 36 divisors (see below), whose sum is σ = 213007200. Its totient is φ = 32719200.

The previous prime is 89978899. The next prime is 89978947. The reversal of 89978900 is 987998.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39800 + ... + 41999.

Almost surely, 2^89978900 is an apocalyptic number.

It is an amenable number.

89978900 is an abundant number, since it is smaller than the sum of its proper divisors (123028300).

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

89978900 is a wasteful number, since it uses less digits than its factorization.

89978900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81824 (or 81817 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 89978900 is about 9485.7208476742. The cubic root of 89978900 is about 448.1054505703.

The spelling of 89978900 in words is "eighty-nine million, nine hundred seventy-eight thousand, nine hundred".