98644590 has 96 divisors (see below), whose sum is σ = 287460576. Its totient is φ = 23258880.

The previous prime is 98644589. The next prime is 98644639. The reversal of 98644590 is 9544689.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35284 + ... + 37976.

It is an arithmetic number, because the mean of its divisors is an integer number (2994381).

Almost surely, 2^98644590 is an apocalyptic number.

98644590 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 98644590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143730288).

98644590 is an abundant number, since it is smaller than the sum of its proper divisors (188815986).

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

98644590 is a wasteful number, since it uses less digits than its factorization.

98644590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 98644590 is about 9931.9982883607. The cubic root of 98644590 is about 462.0522513568.

The spelling of 98644590 in words is "ninety-eight million, six hundred forty-four thousand, five hundred ninety".