90234140 has 24 divisors (see below), whose sum is σ = 189832272. Its totient is φ = 36028800.

The previous prime is 90234139. The next prime is 90234161. The reversal of 90234140 is 4143209.

It is a congruent number.

It is an unprimeable number.

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, 8267 + ... + 15773.

It is an arithmetic number, because the mean of its divisors is an integer number (7909678).

Almost surely, 2^90234140 is an apocalyptic number.

It is an amenable number.

90234140 is an abundant number, since it is smaller than the sum of its proper divisors (99598132).

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

90234140 is a wasteful number, since it uses less digits than its factorization.

90234140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8117 (or 8115 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 90234140 is about 9499.1652264817. The cubic root of 90234140 is about 448.5287589163.

Adding to 90234140 its reverse (4143209), we get a palindrome (94377349).

The spelling of 90234140 in words is "ninety million, two hundred thirty-four thousand, one hundred forty".