99489390 has 128 divisors (see below), whose sum is σ = 320689152. Its totient is φ = 19077120.

The previous prime is 99489373. The next prime is 99489407. The reversal of 99489390 is 9398499.

It is an interprime number because it is at equal distance from previous prime (99489373) and next prime (99489407).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28374 + ... + 31686.

It is an arithmetic number, because the mean of its divisors is an integer number (2505384).

Almost surely, 2^99489390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99489390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160344576).

99489390 is an abundant number, since it is smaller than the sum of its proper divisors (221199762).

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

99489390 is a wasteful number, since it uses less digits than its factorization.

99489390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354.

The product of its (nonzero) digits is 629856, while the sum is 51.

The square root of 99489390 is about 9974.4368262073. The cubic root of 99489390 is about 463.3675210125.

The spelling of 99489390 in words is "ninety-nine million, four hundred eighty-nine thousand, three hundred ninety".