90691258 has 32 divisors (see below), whose sum is σ = 160905600. Its totient is φ = 38314080.

The previous prime is 90691253. The next prime is 90691259. The reversal of 90691258 is 85219609.

It is a self number, because there is not a number n which added to its sum of digits gives 90691258.

It is not an unprimeable number, because it can be changed into a prime (90691253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 49173 + ... + 50983.

It is an arithmetic number, because the mean of its divisors is an integer number (5028300).

Almost surely, 2^90691258 is an apocalyptic number.

90691258 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

90691258 is a deficient number, since it is larger than the sum of its proper divisors (70214342).

90691258 is a wasteful number, since it uses less digits than its factorization.

90691258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 90691258 is about 9523.1957871294. The cubic root of 90691258 is about 449.2848855820.

The spelling of 90691258 in words is "ninety million, six hundred ninety-one thousand, two hundred fifty-eight".