89990815 has 8 divisors (see below), whose sum is σ = 108056448. Its totient is φ = 71947680.

The previous prime is 89990807. The next prime is 89990819. The reversal of 89990815 is 51809998.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 89990815 - 2³ = 89990807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89990819) 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, 5010 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (13507056).

Almost surely, 2^89990815 is an apocalyptic number.

89990815 is a deficient number, since it is larger than the sum of its proper divisors (18065633).

89990815 is a wasteful number, since it uses less digits than its factorization.

89990815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11249.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 89990815 is about 9486.3488761483. The cubic root of 89990815 is about 448.1252290620.

The spelling of 89990815 in words is "eighty-nine million, nine hundred ninety thousand, eight hundred fifteen".