90969440 has 48 divisors (see below), whose sum is σ = 219506112. Its totient is φ = 35610624.

The previous prime is 90969427. The next prime is 90969457. The reversal of 90969440 is 4496909.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472 + ... + 13568.

It is an arithmetic number, because the mean of its divisors is an integer number (4573044).

Almost surely, 2^90969440 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 90969440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109753056).

90969440 is an abundant number, since it is smaller than the sum of its proper divisors (128536672).

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

90969440 is a wasteful number, since it uses less digits than its factorization.

90969440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12159 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 90969440 is about 9537.7901004373. The cubic root of 90969440 is about 449.7437883075.

The spelling of 90969440 in words is "ninety million, nine hundred sixty-nine thousand, four hundred forty".