89977998 has 32 divisors (see below), whose sum is σ = 198812160. Its totient is φ = 26919360.

The previous prime is 89977997. The next prime is 89978023.

89977998 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89977997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3415 + ... + 13842.

It is an arithmetic number, because the mean of its divisors is an integer number (6212880).

Almost surely, 2^89977998 is an apocalyptic number.

89977998 is an abundant number, since it is smaller than the sum of its proper divisors (108834162).

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

89977998 is a wasteful number, since it uses less digits than its factorization.

89977998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17352.

The product of its digits is 20575296, while the sum is 66.

The square root of 89977998 is about 9485.6733024072. The cubic root of 89977998 is about 448.1039532101.

It can be divided in two parts, 8997 and 7998, that multiplied together give a triangular number (71958006 = T₁₁₉₉₆).

The spelling of 89977998 in words is "eighty-nine million, nine hundred seventy-seven thousand, nine hundred ninety-eight".