40113144 has 80 divisors (see below), whose sum is σ = 113633520. Its totient is φ = 13219200.

The previous prime is 40113133. The next prime is 40113167. The reversal of 40113144 is 44131104.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 66444 + ... + 67044.

It is an arithmetic number, because the mean of its divisors is an integer number (1420419).

Almost surely, 2^40113144 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 40113144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56816760).

40113144 is an abundant number, since it is smaller than the sum of its proper divisors (73520376).

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

40113144 is a wasteful number, since it uses less digits than its factorization.

40113144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40113144 is about 6333.4938225280. The cubic root of 40113144 is about 342.3173416435.

Adding to 40113144 its reverse (44131104), we get a palindrome (84244248).

The spelling of 40113144 in words is "forty million, one hundred thirteen thousand, one hundred forty-four".