90997140 has 48 divisors (see below), whose sum is σ = 274393728. Its totient is φ = 22399104.

The previous prime is 90997111. The next prime is 90997147. The reversal of 90997140 is 4179909.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90997147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57552 + ... + 59111.

It is an arithmetic number, because the mean of its divisors is an integer number (5716536).

Almost surely, 2^90997140 is an apocalyptic number.

It is an amenable number.

90997140 is an abundant number, since it is smaller than the sum of its proper divisors (183396588).

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

90997140 is a wasteful number, since it uses less digits than its factorization.

90997140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116688 (or 116686 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 90997140 is about 9539.2421082600. The cubic root of 90997140 is about 449.7894323490.

The spelling of 90997140 in words is "ninety million, nine hundred ninety-seven thousand, one hundred forty".