89999478 has 16 divisors (see below), whose sum is σ = 199998960. Its totient is φ = 29999808.

The previous prime is 89999477. The next prime is 89999509. The reversal of 89999478 is 87499998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89999471) 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, 833275 + ... + 833382.

It is an arithmetic number, because the mean of its divisors is an integer number (12499935).

Almost surely, 2^89999478 is an apocalyptic number.

89999478 is an abundant number, since it is smaller than the sum of its proper divisors (109999482).

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

89999478 is a wasteful number, since it uses less digits than its factorization.

89999478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666668 (or 1666662 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 89999478 is about 9486.8054686496. The cubic root of 89999478 is about 448.1396082491.

The spelling of 89999478 in words is "eighty-nine million, nine hundred ninety-nine thousand, four hundred seventy-eight".