99090440 has 128 divisors (see below), whose sum is σ = 248209920. Its totient is φ = 35481600.

The previous prime is 99090437. The next prime is 99090457. The reversal of 99090440 is 4409099.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 99090440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1395605 + ... + 1395675.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^99090440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99090440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124104960).

99090440 is an abundant number, since it is smaller than the sum of its proper divisors (149119480).

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

99090440 is a wasteful number, since it uses less digits than its factorization.

99090440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 99090440 is about 9954.4181145861. The cubic root of 99090440 is about 462.7473271748.

The spelling of 99090440 in words is "ninety-nine million, ninety thousand, four hundred forty".