90408204690 has 32 divisors (see below), whose sum is σ = 217480830336. Its totient is φ = 24053172480.

The previous prime is 90408204647. The next prime is 90408204701. The reversal of 90408204690 is 9640280409.

It is a super-2 number, since 2×90408204690² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 3466926 + ... + 3492905.

It is an arithmetic number, because the mean of its divisors is an integer number (6796275948).

Almost surely, 2^90408204690 is an apocalyptic number.

90408204690 is an abundant number, since it is smaller than the sum of its proper divisors (127072625646).

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

90408204690 is a wasteful number, since it uses less digits than its factorization.

90408204690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960274.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 90408204690 in words is "ninety billion, four hundred eight million, two hundred four thousand, six hundred ninety".