90802720 has 48 divisors (see below), whose sum is σ = 221453568. Its totient is φ = 35147520.

The previous prime is 90802717. The next prime is 90802721. The reversal of 90802720 is 2720809.

It is not an unprimeable number, because it can be changed into a prime (90802721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194 + ... + 14113.

It is an arithmetic number, because the mean of its divisors is an integer number (4613616).

Almost surely, 2^90802720 is an apocalyptic number.

It is an amenable number.

90802720 is an abundant number, since it is smaller than the sum of its proper divisors (130650848).

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

90802720 is a wasteful number, since it uses less digits than its factorization.

90802720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18353 (or 18345 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 90802720 is about 9529.0461222517. The cubic root of 90802720 is about 449.4688713053.

The spelling of 90802720 in words is "ninety million, eight hundred two thousand, seven hundred twenty".