90970320 has 160 divisors (see below), whose sum is σ = 325193472. Its totient is φ = 20606976.

The previous prime is 90970301. The next prime is 90970343. The reversal of 90970320 is 2307909.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 290484 + ... + 290796.

Almost surely, 2^90970320 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 90970320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162596736).

90970320 is an abundant number, since it is smaller than the sum of its proper divisors (234223152).

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

90970320 is a wasteful number, since it uses less digits than its factorization.

90970320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 90970320 is about 9537.8362326054. The cubic root of 90970320 is about 449.7452385135.

The spelling of 90970320 in words is "ninety million, nine hundred seventy thousand, three hundred twenty".