90193740 has 96 divisors (see below), whose sum is σ = 310840320. Its totient is φ = 19028736.

The previous prime is 90193739. The next prime is 90193759. The reversal of 90193740 is 4739109.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2800 + ... + 13719.

It is an arithmetic number, because the mean of its divisors is an integer number (3237920).

Almost surely, 2^90193740 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 90193740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155420160).

90193740 is an abundant number, since it is smaller than the sum of its proper divisors (220646580).

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

90193740 is a wasteful number, since it uses less digits than its factorization.

90193740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16551 (or 16549 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90193740 is about 9497.0384857597. The cubic root of 90193740 is about 448.4618098773.

The spelling of 90193740 in words is "ninety million, one hundred ninety-three thousand, seven hundred forty".