40024872 has 72 divisors (see below), whose sum is σ = 112437390. Its totient is φ = 12862080.

The previous prime is 40024781. The next prime is 40024877. The reversal of 40024872 is 27842004.

It can be written as a sum of positive squares in 3 ways, for example, as 38266596 + 1758276 = 6186^2 + 1326^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (40024877) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60222 + ... + 60882.

Almost surely, 2^40024872 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 40024872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56218695).

40024872 is an abundant number, since it is smaller than the sum of its proper divisors (72412518).

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

40024872 is a wasteful number, since it uses less digits than its factorization.

40024872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 40024872 is about 6326.5213190188. The cubic root of 40024872 is about 342.0660588514.

Adding to 40024872 its reverse (27842004), we get a palindrome (67866876).

The spelling of 40024872 in words is "forty million, twenty-four thousand, eight hundred seventy-two".