40731120 has 160 divisors (see below), whose sum is σ = 142401600. Its totient is φ = 10699776.

The previous prime is 40731113. The next prime is 40731127. The reversal of 40731120 is 2113704.

It is an interprime number because it is at equal distance from previous prime (40731113) and next prime (40731127).

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

It is a junction number, because it is equal to n+sod(n) for n = 40731093 and 40731102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40731127) 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, 235354 + ... + 235526.

It is an arithmetic number, because the mean of its divisors is an integer number (890010).

Almost surely, 2^40731120 is an apocalyptic number.

40731120 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 40731120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71200800).

40731120 is an abundant number, since it is smaller than the sum of its proper divisors (101670480).

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

40731120 is a wasteful number, since it uses less digits than its factorization.

40731120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 40731120 is about 6382.0937003463. The cubic root of 40731120 is about 344.0662843246.

Adding to 40731120 its reverse (2113704), we get a palindrome (42844824).

The spelling of 40731120 in words is "forty million, seven hundred thirty-one thousand, one hundred twenty".