90722900 has 18 divisors (see below), whose sum is σ = 196868910. Its totient is φ = 36289120.

The previous prime is 90722893. The next prime is 90722903. The reversal of 90722900 is 922709.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1684804 + 89038096 = 1298^2 + 9436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90722903) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 453515 + ... + 453714.

Almost surely, 2^90722900 is an apocalyptic number.

It is an amenable number.

90722900 is an abundant number, since it is smaller than the sum of its proper divisors (106146010).

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

90722900 is a wasteful number, since it uses less digits than its factorization.

90722900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907243 (or 907236 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 90722900 is about 9524.8569543065. The cubic root of 90722900 is about 449.3371310414.

The spelling of 90722900 in words is "ninety million, seven hundred twenty-two thousand, nine hundred".