90909774 has 12 divisors (see below), whose sum is σ = 196971216. Its totient is φ = 30303252.

The previous prime is 90909773. The next prime is 90909857. The reversal of 90909774 is 47790909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2525254 + ... + 2525289.

It is an arithmetic number, because the mean of its divisors is an integer number (16414268).

Almost surely, 2^90909774 is an apocalyptic number.

90909774 is an abundant number, since it is smaller than the sum of its proper divisors (106061442).

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

90909774 is a wasteful number, since it uses less digits than its factorization.

90909774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050551 (or 5050548 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 90909774 is about 9534.6617139781. The cubic root of 90909774 is about 449.6454392289.

The spelling of 90909774 in words is "ninety million, nine hundred nine thousand, seven hundred seventy-four".