90919398 has 16 divisors (see below), whose sum is σ = 183539520. Its totient is φ = 30023016.

The previous prime is 90919393. The next prime is 90919399. The reversal of 90919398 is 89391909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90919393) 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, 70168 + ... + 71451.

It is an arithmetic number, because the mean of its divisors is an integer number (11471220).

Almost surely, 2^90919398 is an apocalyptic number.

90919398 is an abundant number, since it is smaller than the sum of its proper divisors (92620122).

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

90919398 is a wasteful number, since it uses less digits than its factorization.

90919398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141731.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 90919398 is about 9535.1663855436. The cubic root of 90919398 is about 449.6613056381.

The spelling of 90919398 in words is "ninety million, nine hundred nineteen thousand, three hundred ninety-eight".