90257895 has 160 divisors (see below), whose sum is σ = 208158720. Its totient is φ = 36391680.

The previous prime is 90257873. The next prime is 90257899. The reversal of 90257895 is 59875209.

It is a happy number.

It is not a de Polignac number, because 90257895 - 2⁵ = 90257863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 90257895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90257899) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1142466 + ... + 1142544.

It is an arithmetic number, because the mean of its divisors is an integer number (1300992).

Almost surely, 2^90257895 is an apocalyptic number.

90257895 is an abundant number, since it is smaller than the sum of its proper divisors (117900825).

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

90257895 is a wasteful number, since it uses less digits than its factorization.

90257895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 90257895 is about 9500.4155172287. The cubic root of 90257895 is about 448.5681152907.

The spelling of 90257895 in words is "ninety million, two hundred fifty-seven thousand, eight hundred ninety-five".