40131124040 has 128 divisors (see below), whose sum is σ = 107838812160. Its totient is φ = 13141734144.

The previous prime is 40131124031. The next prime is 40131124049. The reversal of 40131124040 is 4042113104.

It is an interprime number because it is at equal distance from previous prime (40131124031) and next prime (40131124049).

It is a super-2 number, since 2×40131124040² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (40131124049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4780727 + ... + 4789113.

It is an arithmetic number, because the mean of its divisors is an integer number (842490720).

Almost surely, 2^40131124040 is an apocalyptic number.

40131124040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40131124040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53919406080).

40131124040 is an abundant number, since it is smaller than the sum of its proper divisors (67707688120).

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

40131124040 is a wasteful number, since it uses less digits than its factorization.

40131124040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171 (or 9167 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 40131124040 its reverse (4042113104), we get a palindrome (44173237144).

The spelling of 40131124040 in words is "forty billion, one hundred thirty-one million, one hundred twenty-four thousand, forty".