90262140 has 48 divisors (see below), whose sum is σ = 254989728. Its totient is φ = 23855104.

The previous prime is 90262069. The next prime is 90262157. The reversal of 90262140 is 4126209.

It is a self number, because there is not a number n which added to its sum of digits gives 90262140.

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 15 ways as a sum of consecutive naturals, for example, 124 + ... + 13436.

It is an arithmetic number, because the mean of its divisors is an integer number (5312286).

Almost surely, 2^90262140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90262140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127494864).

90262140 is an abundant number, since it is smaller than the sum of its proper divisors (164727588).

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

90262140 is a wasteful number, since it uses less digits than its factorization.

90262140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13438 (or 13436 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 90262140 is about 9500.6389258828. The cubic root of 90262140 is about 448.5751475169.

Adding to 90262140 its reverse (4126209), we get a palindrome (94388349).

The spelling of 90262140 in words is "ninety million, two hundred sixty-two thousand, one hundred forty".