90802085 has 32 divisors (see below), whose sum is σ = 123790464. Its totient is φ = 63360000.

The previous prime is 90802081. The next prime is 90802087. The reversal of 90802085 is 58020809.

It is not a de Polignac number, because 90802085 - 2² = 90802081 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90802081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150785 + ... + 151385.

It is an arithmetic number, because the mean of its divisors is an integer number (3868452).

Almost surely, 2^90802085 is an apocalyptic number.

It is an amenable number.

90802085 is a deficient number, since it is larger than the sum of its proper divisors (32988379).

90802085 is a wasteful number, since it uses less digits than its factorization.

90802085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 90802085 is about 9529.0128030138. The cubic root of 90802085 is about 449.4678235635.

The spelling of 90802085 in words is "ninety million, eight hundred two thousand, eighty-five".