90194190 has 64 divisors (see below), whose sum is σ = 224888832. Its totient is φ = 23126400.

The previous prime is 90194171. The next prime is 90194207. The reversal of 90194190 is 9149109.

It is a super-2 number, since 2×90194190² = 16269983819512200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272325 + ... + 272655.

It is an arithmetic number, because the mean of its divisors is an integer number (3513888).

Almost surely, 2^90194190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90194190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112444416).

90194190 is an abundant number, since it is smaller than the sum of its proper divisors (134694642).

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

90194190 is a wasteful number, since it uses less digits than its factorization.

90194190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 90194190 is about 9497.0621773262. The cubic root of 90194190 is about 448.4625557069.

The spelling of 90194190 in words is "ninety million, one hundred ninety-four thousand, one hundred ninety".