90904390 has 16 divisors (see below), whose sum is σ = 163862640. Its totient is φ = 36309600.

The previous prime is 90904313. The next prime is 90904391. The reversal of 90904390 is 9340909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90904391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (10241415).

Almost surely, 2^90904390 is an apocalyptic number.

90904390 is a deficient number, since it is larger than the sum of its proper divisors (72958250).

90904390 is a wasteful number, since it uses less digits than its factorization.

90904390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13047.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 90904390 is about 9534.3793715165. The cubic root of 90904390 is about 449.6365625199.

The spelling of 90904390 in words is "ninety million, nine hundred four thousand, three hundred ninety".