90085390 has 16 divisors (see below), whose sum is σ = 162775008. Its totient is φ = 35896096.

The previous prime is 90085381. The next prime is 90085399. The reversal of 90085390 is 9358009.

It is an interprime number because it is at equal distance from previous prime (90085381) and next prime (90085399).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90085399) 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, 14497 + ... + 19756.

It is an arithmetic number, because the mean of its divisors is an integer number (10173438).

Almost surely, 2^90085390 is an apocalyptic number.

90085390 is a deficient number, since it is larger than the sum of its proper divisors (72689618).

90085390 is a wasteful number, since it uses less digits than its factorization.

90085390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34523.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 90085390 is about 9491.3323616866. The cubic root of 90085390 is about 448.2821584309.

The spelling of 90085390 in words is "ninety million, eighty-five thousand, three hundred ninety".