90037642 has 4 divisors (see below), whose sum is σ = 135056466. Its totient is φ = 45018820.

The previous prime is 90037639. The next prime is 90037691. The reversal of 90037642 is 24673009.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 9235521 = 8989^2 + 3039^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22509409 + ... + 22509412.

Almost surely, 2^90037642 is an apocalyptic number.

90037642 is a deficient number, since it is larger than the sum of its proper divisors (45018824).

90037642 is a wasteful number, since it uses less digits than its factorization.

90037642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45018823.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 90037642 is about 9488.8166807037. The cubic root of 90037642 is about 448.2029433687.

The spelling of 90037642 in words is "ninety million, thirty-seven thousand, six hundred forty-two".