90509790 has 32 divisors (see below), whose sum is σ = 248256000. Its totient is φ = 20687904.

The previous prime is 90509789. The next prime is 90509803. The reversal of 90509790 is 9790509.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215290 + ... + 215709.

It is an arithmetic number, because the mean of its divisors is an integer number (7758000).

Almost surely, 2^90509790 is an apocalyptic number.

90509790 is an abundant number, since it is smaller than the sum of its proper divisors (157746210).

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

90509790 is a wasteful number, since it uses less digits than its factorization.

90509790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431016.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 90509790 is about 9513.6633322816. The cubic root of 90509790 is about 448.9850210693.

The spelling of 90509790 in words is "ninety million, five hundred nine thousand, seven hundred ninety".