90161488 has 20 divisors (see below), whose sum is σ = 176420628. Its totient is φ = 44633600.

The previous prime is 90161483. The next prime is 90161509. The reversal of 90161488 is 88416109.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48274704 + 41886784 = 6948^2 + 6472^2 .

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90161483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26281 + ... + 29512.

Almost surely, 2^90161488 is an apocalyptic number.

It is an amenable number.

90161488 is a deficient number, since it is larger than the sum of its proper divisors (86259140).

90161488 is a wasteful number, since it uses less digits than its factorization.

90161488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55902 (or 55896 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 90161488 is about 9495.3403309202. The cubic root of 90161488 is about 448.4083489806.

The spelling of 90161488 in words is "ninety million, one hundred sixty-one thousand, four hundred eighty-eight".