90113240 has 32 divisors (see below), whose sum is σ = 231720480. Its totient is φ = 30895872.

The previous prime is 90113239. The next prime is 90113279. The reversal of 90113240 is 4231109.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 160637 + ... + 161196.

It is an arithmetic number, because the mean of its divisors is an integer number (7241265).

Almost surely, 2^90113240 is an apocalyptic number.

It is an amenable number.

90113240 is an abundant number, since it is smaller than the sum of its proper divisors (141607240).

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

90113240 is a wasteful number, since it uses less digits than its factorization.

90113240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321851 (or 321847 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 90113240 is about 9492.7993763694. The cubic root of 90113240 is about 448.3283493163.

Adding to 90113240 its reverse (4231109), we get a palindrome (94344349).

It can be divided in two parts, 901 and 13240, that added together give a palindrome (14141).

The spelling of 90113240 in words is "ninety million, one hundred thirteen thousand, two hundred forty".