90245787 has 8 divisors (see below), whose sum is σ = 121432080. Its totient is φ = 59611680.

The previous prime is 90245761. The next prime is 90245789. The reversal of 90245787 is 78754209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90245787 - 2⁶ = 90245723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90245789) 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, 137664 + ... + 138317.

It is an arithmetic number, because the mean of its divisors is an integer number (15179010).

Almost surely, 2^90245787 is an apocalyptic number.

90245787 is a deficient number, since it is larger than the sum of its proper divisors (31186293).

90245787 is a wasteful number, since it uses less digits than its factorization.

90245787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276093.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 90245787 is about 9499.7782605701. The cubic root of 90245787 is about 448.5480560829.

The spelling of 90245787 in words is "ninety million, two hundred forty-five thousand, seven hundred eighty-seven".