90136128 has 56 divisors (see below), whose sum is σ = 240141760. Its totient is φ = 29836800.

The previous prime is 90136117. The next prime is 90136139. The reversal of 90136128 is 82163109.

It is an interprime number because it is at equal distance from previous prime (90136117) and next prime (90136139).

It is a junction number, because it is equal to n+sod(n) for n = 90136095 and 90136104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27438 + ... + 30546.

Almost surely, 2^90136128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90136128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120070880).

90136128 is an abundant number, since it is smaller than the sum of its proper divisors (150005632).

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

90136128 is a wasteful number, since it uses less digits than its factorization.

90136128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275 (or 3265 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 90136128 is about 9494.0048451641. The cubic root of 90136128 is about 448.3663033048.

The spelling of 90136128 in words is "ninety million, one hundred thirty-six thousand, one hundred twenty-eight".