90394820 has 24 divisors (see below), whose sum is σ = 190103424. Its totient is φ = 36105696.

The previous prime is 90394817. The next prime is 90394849. The reversal of 90394820 is 2849309.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12869 + ... + 18611.

It is an arithmetic number, because the mean of its divisors is an integer number (7920976).

Almost surely, 2^90394820 is an apocalyptic number.

It is an amenable number.

90394820 is an abundant number, since it is smaller than the sum of its proper divisors (99708604).

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

90394820 is a wasteful number, since it uses less digits than its factorization.

90394820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539 (or 6537 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 90394820 is about 9507.6190500041. The cubic root of 90394820 is about 448.7948328772.

The spelling of 90394820 in words is "ninety million, three hundred ninety-four thousand, eight hundred twenty".