90197740 has 12 divisors (see below), whose sum is σ = 189415296. Its totient is φ = 36079088.

The previous prime is 90197719. The next prime is 90197773. The reversal of 90197740 is 4779109.

It is a super-2 number, since 2×90197740² = 16271264602215200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90197740.

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 3 ways as a sum of consecutive naturals, for example, 2254924 + ... + 2254963.

It is an arithmetic number, because the mean of its divisors is an integer number (15784608).

Almost surely, 2^90197740 is an apocalyptic number.

It is an amenable number.

90197740 is an abundant number, since it is smaller than the sum of its proper divisors (99217556).

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

90197740 is a wasteful number, since it uses less digits than its factorization.

90197740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509896 (or 4509894 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 90197740 is about 9497.2490753902. The cubic root of 90197740 is about 448.4684393866.

The spelling of 90197740 in words is "ninety million, one hundred ninety-seven thousand, seven hundred forty".