90205742 has 12 divisors (see below), whose sum is σ = 148728048. Its totient is φ = 41002500.

The previous prime is 90205729. The next prime is 90205783. The reversal of 90205742 is 24750209.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 186134 + ... + 186617.

It is an arithmetic number, because the mean of its divisors is an integer number (12394004).

Almost surely, 2^90205742 is an apocalyptic number.

90205742 is a deficient number, since it is larger than the sum of its proper divisors (58522306).

90205742 is a wasteful number, since it uses less digits than its factorization.

90205742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372775 (or 372764 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 90205742 is about 9497.6703459322. The cubic root of 90205742 is about 448.4817011318.

The spelling of 90205742 in words is "ninety million, two hundred five thousand, seven hundred forty-two".