90253790 has 16 divisors (see below), whose sum is σ = 177225840. Its totient is φ = 32819520.

The previous prime is 90253789. The next prime is 90253811. The reversal of 90253790 is 9735209.

It is a self number, because there is not a number n which added to its sum of digits gives 90253790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410135 + ... + 410354.

It is an arithmetic number, because the mean of its divisors is an integer number (11076615).

Almost surely, 2^90253790 is an apocalyptic number.

90253790 is a deficient number, since it is larger than the sum of its proper divisors (86972050).

90253790 is a wasteful number, since it uses less digits than its factorization.

90253790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820507.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 90253790 is about 9500.1994715901. The cubic root of 90253790 is about 448.5613147775.

Adding to 90253790 its reverse (9735209), we get a palindrome (99988999).

The spelling of 90253790 in words is "ninety million, two hundred fifty-three thousand, seven hundred ninety".