90135790 has 16 divisors (see below), whose sum is σ = 162363168. Its totient is φ = 36027936.

The previous prime is 90135769. The next prime is 90135797. The reversal of 90135790 is 9753109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90135797) 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, 16999 + ... + 21661.

It is an arithmetic number, because the mean of its divisors is an integer number (10147698).

Almost surely, 2^90135790 is an apocalyptic number.

90135790 is a deficient number, since it is larger than the sum of its proper divisors (72227378).

90135790 is a wasteful number, since it uses less digits than its factorization.

90135790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 90135790 is about 9493.9870444403. The cubic root of 90135790 is about 448.3657428636.

Adding to 90135790 its reverse (9753109), we get a palindrome (99888899).

The spelling of 90135790 in words is "ninety million, one hundred thirty-five thousand, seven hundred ninety".