90311898 has 8 divisors (see below), whose sum is σ = 180623808. Its totient is φ = 30103964.

The previous prime is 90311849. The next prime is 90311899. The reversal of 90311898 is 89811309.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

90311898 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90311899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525986 + ... + 7525997.

It is an arithmetic number, because the mean of its divisors is an integer number (22577976).

Almost surely, 2^90311898 is an apocalyptic number.

90311898 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90311898 is a wasteful number, since it uses less digits than its factorization.

90311898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15051988.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 90311898 is about 9503.2572310761. The cubic root of 90311898 is about 448.6575597074.

The spelling of 90311898 in words is "ninety million, three hundred eleven thousand, eight hundred ninety-eight".