90868724 has 12 divisors (see below), whose sum is σ = 160428324. Its totient is φ = 45032064.

The previous prime is 90868717. The next prime is 90868759. The reversal of 90868724 is 42786809.

It can be written as a sum of positive squares in 2 ways, for example, as 4972900 + 85895824 = 2230^2 + 9268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100067 + ... + 100970.

It is an arithmetic number, because the mean of its divisors is an integer number (13369027).

Almost surely, 2^90868724 is an apocalyptic number.

It is an amenable number.

90868724 is a deficient number, since it is larger than the sum of its proper divisors (69559600).

90868724 is a wasteful number, since it uses less digits than its factorization.

90868724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201154 (or 201152 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 90868724 is about 9532.5087988420. The cubic root of 90868724 is about 449.5777504155.

The spelling of 90868724 in words is "ninety million, eight hundred sixty-eight thousand, seven hundred twenty-four".