90649390 has 16 divisors (see below), whose sum is σ = 175720608. Its totient is φ = 33470496.

The previous prime is 90649379. The next prime is 90649397. The reversal of 90649390 is 9394609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90649397) 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, 348522 + ... + 348781.

It is an arithmetic number, because the mean of its divisors is an integer number (10982538).

Almost surely, 2^90649390 is an apocalyptic number.

90649390 is a deficient number, since it is larger than the sum of its proper divisors (85071218).

90649390 is a wasteful number, since it uses less digits than its factorization.

90649390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697323.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 90649390 is about 9520.9973217095. The cubic root of 90649390 is about 449.2157368554.

The spelling of 90649390 in words is "ninety million, six hundred forty-nine thousand, three hundred ninety".