40031244 has 36 divisors (see below), whose sum is σ = 110390280. Its totient is φ = 12130560.

The previous prime is 40031239. The next prime is 40031269. The reversal of 40031244 is 44213004.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50149 + ... + 50940.

Almost surely, 2^40031244 is an apocalyptic number.

40031244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40031244 is an abundant number, since it is smaller than the sum of its proper divisors (70359036).

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

40031244 is a wasteful number, since it uses less digits than its factorization.

40031244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101110 (or 101105 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40031244 is about 6327.0248932654. The cubic root of 40031244 is about 342.0842103087.

Adding to 40031244 its reverse (44213004), we get a palindrome (84244248).

The spelling of 40031244 in words is "forty million, thirty-one thousand, two hundred forty-four".