90397822 has 4 divisors (see below), whose sum is σ = 135596736. Its totient is φ = 45198910.

The previous prime is 90397819. The next prime is 90397837. The reversal of 90397822 is 22879309.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22599454 + ... + 22599457.

It is an arithmetic number, because the mean of its divisors is an integer number (33899184).

Almost surely, 2^90397822 is an apocalyptic number.

90397822 is a deficient number, since it is larger than the sum of its proper divisors (45198914).

90397822 is a wasteful number, since it uses less digits than its factorization.

90397822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45198913.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90397822 is about 9507.7769220781. The cubic root of 90397822 is about 448.7998009612.

It can be divided in two parts, 90397 and 822, that added together give a palindrome (91219).

The spelling of 90397822 in words is "ninety million, three hundred ninety-seven thousand, eight hundred twenty-two".