90198256 has 20 divisors (see below), whose sum is σ = 177723000. Its totient is φ = 44334272.

The previous prime is 90198253. The next prime is 90198259. The reversal of 90198256 is 65289109.

It is an interprime number because it is at equal distance from previous prime (90198253) and next prime (90198259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90198253) 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, 46831 + ... + 48718.

It is an arithmetic number, because the mean of its divisors is an integer number (8886150).

Almost surely, 2^90198256 is an apocalyptic number.

It is an amenable number.

90198256 is a deficient number, since it is larger than the sum of its proper divisors (87524744).

90198256 is a wasteful number, since it uses less digits than its factorization.

90198256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95616 (or 95610 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 90198256 is about 9497.2762411125. The cubic root of 90198256 is about 448.4692945790.

The spelling of 90198256 in words is "ninety million, one hundred ninety-eight thousand, two hundred fifty-six".