40031712 has 96 divisors (see below), whose sum is σ = 133459200. Its totient is φ = 11435904.

The previous prime is 40031657. The next prime is 40031713. The reversal of 40031712 is 21713004.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2739 + ... + 9357.

It is an arithmetic number, because the mean of its divisors is an integer number (1390200).

Almost surely, 2^40031712 is an apocalyptic number.

40031712 is a gapful number since it is divisible by the number (42) 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 40031712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66729600).

40031712 is an abundant number, since it is smaller than the sum of its proper divisors (93427488).

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

40031712 is a wasteful number, since it uses less digits than its factorization.

40031712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6631 counting only the distinct ones).

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

The square root of 40031712 is about 6327.0618773646. The cubic root of 40031712 is about 342.0855433907.

Adding to 40031712 its reverse (21713004), we get a palindrome (61744716).

The spelling of 40031712 in words is "forty million, thirty-one thousand, seven hundred twelve".