90613290 has 16 divisors (see below), whose sum is σ = 217471968. Its totient is φ = 24163536.

The previous prime is 90613283. The next prime is 90613291. The reversal of 90613290 is 9231609.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 3020443 = 90613290 / (9 + 0 + 6 + 1 + 3 + 2 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (90613291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510192 + ... + 1510251.

It is an arithmetic number, because the mean of its divisors is an integer number (13591998).

Almost surely, 2^90613290 is an apocalyptic number.

90613290 is an abundant number, since it is smaller than the sum of its proper divisors (126858678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90613290 is a wasteful number, since it uses less digits than its factorization.

90613290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020453.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 90613290 is about 9519.1013231292. The cubic root of 90613290 is about 449.1560973981.

Adding to 90613290 its reverse (9231609), we get a palindrome (99844899).

It can be divided in two parts, 906 and 13290, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 90613290 in words is "ninety million, six hundred thirteen thousand, two hundred ninety".