90115398 has 12 divisors (see below), whose sum is σ = 195250068. Its totient is φ = 30038460.

The previous prime is 90115391. The next prime is 90115409. The reversal of 90115398 is 89351109.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90115391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2503188 + ... + 2503223.

It is an arithmetic number, because the mean of its divisors is an integer number (16270839).

Almost surely, 2^90115398 is an apocalyptic number.

90115398 is an abundant number, since it is smaller than the sum of its proper divisors (105134670).

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

90115398 is a wasteful number, since it uses less digits than its factorization.

90115398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006419 (or 5006416 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 90115398 is about 9492.9130407900. The cubic root of 90115398 is about 448.3319280907.

The spelling of 90115398 in words is "ninety million, one hundred fifteen thousand, three hundred ninety-eight".