90231340 has 24 divisors (see below), whose sum is σ = 191443392. Its totient is φ = 35719680.

The previous prime is 90231331. The next prime is 90231367. The reversal of 90231340 is 4313209.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21316 + ... + 25195.

It is an arithmetic number, because the mean of its divisors is an integer number (7976808).

Almost surely, 2^90231340 is an apocalyptic number.

It is an amenable number.

90231340 is an abundant number, since it is smaller than the sum of its proper divisors (101212052).

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

90231340 is a wasteful number, since it uses less digits than its factorization.

90231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46617 (or 46615 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 90231340 is about 9499.0178439668. The cubic root of 90231340 is about 448.5241195284.

Adding to 90231340 its reverse (4313209), we get a palindrome (94544549).

The spelling of 90231340 in words is "ninety million, two hundred thirty-one thousand, three hundred forty".