90309194808 has 96 divisors (see below), whose sum is σ = 269039730960. Its totient is φ = 25173281280.

The previous prime is 90309194711. The next prime is 90309194837. The reversal of 90309194808 is 80849190309.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 888291 + ... + 984722.

Almost surely, 2^90309194808 is an apocalyptic number.

90309194808 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

90309194808 is an abundant number, since it is smaller than the sum of its proper divisors (178730536152).

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

90309194808 is a wasteful number, since it uses less digits than its factorization.

90309194808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873077 (or 1873066 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 90309194808 in words is "ninety billion, three hundred nine million, one hundred ninety-four thousand, eight hundred eight".