89621790 has 48 divisors (see below), whose sum is σ = 228511152. Its totient is φ = 22491136.

The previous prime is 89621789. The next prime is 89621821. The reversal of 89621790 is 9712698.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3502 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (4760649).

Almost surely, 2^89621790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89621790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114255576).

89621790 is an abundant number, since it is smaller than the sum of its proper divisors (138889362).

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

89621790 is a wasteful number, since it uses less digits than its factorization.

89621790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381 (or 10364 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 89621790 is about 9466.8785774404. The cubic root of 89621790 is about 447.5118480473.

The spelling of 89621790 in words is "eighty-nine million, six hundred twenty-one thousand, seven hundred ninety".