89815812 has 24 divisors (see below), whose sum is σ = 220600800. Its totient is φ = 28362816.

The previous prime is 89815807. The next prime is 89815837. The reversal of 89815812 is 21851898.

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 7 ways as a sum of consecutive naturals, for example, 196737 + ... + 197192.

It is an arithmetic number, because the mean of its divisors is an integer number (9191700).

Almost surely, 2^89815812 is an apocalyptic number.

It is an amenable number.

89815812 is an abundant number, since it is smaller than the sum of its proper divisors (130784988).

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

89815812 is a wasteful number, since it uses less digits than its factorization.

89815812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393955 (or 393953 counting only the distinct ones).

The product of its digits is 46080, while the sum is 42.

The square root of 89815812 is about 9477.1204487439. The cubic root of 89815812 is about 447.8345543956.

The spelling of 89815812 in words is "eighty-nine million, eight hundred fifteen thousand, eight hundred twelve".