90239724 has 24 divisors (see below), whose sum is σ = 233955120. Its totient is φ = 30079872.

The previous prime is 90239719. The next prime is 90239731. The reversal of 90239724 is 42793209.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417669 + ... + 417884.

It is an arithmetic number, because the mean of its divisors is an integer number (9748130).

Almost surely, 2^90239724 is an apocalyptic number.

It is an amenable number.

90239724 is an abundant number, since it is smaller than the sum of its proper divisors (143715396).

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

90239724 is a wasteful number, since it uses less digits than its factorization.

90239724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835566 (or 835558 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 90239724 is about 9499.4591424986. The cubic root of 90239724 is about 448.5380108946.

The spelling of 90239724 in words is "ninety million, two hundred thirty-nine thousand, seven hundred twenty-four".