90168040 has 16 divisors (see below), whose sum is σ = 202878180. Its totient is φ = 36067200.

The previous prime is 90168037. The next prime is 90168079. The reversal of 90168040 is 4086109.

It can be written as a sum of positive squares in 2 ways, for example, as 88472836 + 1695204 = 9406^2 + 1302^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127061 + ... + 1127140.

Almost surely, 2^90168040 is an apocalyptic number.

It is an amenable number.

90168040 is an abundant number, since it is smaller than the sum of its proper divisors (112710140).

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

90168040 is a wasteful number, since it uses less digits than its factorization.

90168040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254212 (or 2254208 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 90168040 is about 9495.6853359829. The cubic root of 90168040 is about 448.4192106038.

The spelling of 90168040 in words is "ninety million, one hundred sixty-eight thousand, forty".