89199990 has 72 divisors (see below), whose sum is σ = 254951424. Its totient is φ = 21621600.

The previous prime is 89199977. The next prime is 89199991. The reversal of 89199990 is 9999198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89199991) 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 35 ways as a sum of consecutive naturals, for example, 6795 + ... + 14985.

It is an arithmetic number, because the mean of its divisors is an integer number (3540992).

Almost surely, 2^89199990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89199990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127475712).

89199990 is an abundant number, since it is smaller than the sum of its proper divisors (165751434).

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

89199990 is a wasteful number, since it uses less digits than its factorization.

89199990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8226 (or 8212 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The square root of 89199990 is about 9444.5746330896. The cubic root of 89199990 is about 446.8086804935.

The spelling of 89199990 in words is "eighty-nine million, one hundred ninety-nine thousand, nine hundred ninety".