90008742 has 16 divisors (see below), whose sum is σ = 180452160. Its totient is φ = 29930472.

The previous prime is 90008741. The next prime is 90008773. The reversal of 90008742 is 24780009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90008741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15388 + ... + 20415.

It is an arithmetic number, because the mean of its divisors is an integer number (11278260).

Almost surely, 2^90008742 is an apocalyptic number.

90008742 is an abundant number, since it is smaller than the sum of its proper divisors (90443418).

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

90008742 is a wasteful number, since it uses less digits than its factorization.

90008742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36227.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 90008742 is about 9487.2937131724. The cubic root of 90008742 is about 448.1549839786.

The spelling of 90008742 in words is "ninety million, eight thousand, seven hundred forty-two".