89475978 has 64 divisors (see below), whose sum is σ = 195955200. Its totient is φ = 27144000.

The previous prime is 89475977. The next prime is 89475979. The reversal of 89475978 is 87957498.

It is an interprime number because it is at equal distance from previous prime (89475977) and next prime (89475979).

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (89475973) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 356353 + ... + 356603.

It is an arithmetic number, because the mean of its divisors is an integer number (3061800).

Almost surely, 2^89475978 is an apocalyptic number.

89475978 is an abundant number, since it is smaller than the sum of its proper divisors (106479222).

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

89475978 is a wasteful number, since it uses less digits than its factorization.

89475978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its digits is 5080320, while the sum is 57.

The square root of 89475978 is about 9459.1742768595. The cubic root of 89475978 is about 447.2690201307.

The spelling of 89475978 in words is "eighty-nine million, four hundred seventy-five thousand, nine hundred seventy-eight".