90723942 has 32 divisors (see below), whose sum is σ = 204456960. Its totient is φ = 29814120.

The previous prime is 90723931. The next prime is 90723947. The reversal of 90723942 is 24932709.

It is a junction number, because it is equal to n+sod(n) for n = 90723897 and 90723906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90723947) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7998 + ... + 15665.

It is an arithmetic number, because the mean of its divisors is an integer number (6389280).

Almost surely, 2^90723942 is an apocalyptic number.

90723942 is an abundant number, since it is smaller than the sum of its proper divisors (113733018).

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

90723942 is a wasteful number, since it uses less digits than its factorization.

90723942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23745 (or 23739 counting only the distinct ones).

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

The square root of 90723942 is about 9524.9116531336. The cubic root of 90723942 is about 449.3388513256.

The spelling of 90723942 in words is "ninety million, seven hundred twenty-three thousand, nine hundred forty-two".