90394556 has 24 divisors (see below), whose sum is σ = 181708800. Its totient is φ = 38543472.

The previous prime is 90394519. The next prime is 90394561. The reversal of 90394556 is 65549309.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2540 + ... + 13683.

It is an arithmetic number, because the mean of its divisors is an integer number (7571200).

Almost surely, 2^90394556 is an apocalyptic number.

It is an amenable number.

90394556 is an abundant number, since it is smaller than the sum of its proper divisors (91314244).

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

90394556 is a wasteful number, since it uses less digits than its factorization.

90394556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16433 (or 16431 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 90394556 is about 9507.6051663918. The cubic root of 90394556 is about 448.7943959718.

It can be divided in two parts, 903 and 94556, that added together give a palindrome (95459).

The spelling of 90394556 in words is "ninety million, three hundred ninety-four thousand, five hundred fifty-six".