40030240 has 48 divisors (see below), whose sum is σ = 100141272. Its totient is φ = 15069184.

The previous prime is 40030231. The next prime is 40030241. The reversal of 40030240 is 4203004.

It can be written as a sum of positive squares in 4 ways, for example, as 33039504 + 6990736 = 5748^2 + 2644^2 .

It is a super-2 number, since 2×40030240² = 3204840228915200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40030240.

It is not an unprimeable number, because it can be changed into a prime (40030241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4639 + ... + 10078.

Almost surely, 2^40030240 is an apocalyptic number.

40030240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40030240 is an abundant number, since it is smaller than the sum of its proper divisors (60111032).

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

40030240 is a wasteful number, since it uses less digits than its factorization.

40030240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749 (or 14741 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40030240 is about 6326.9455505797. The cubic root of 40030240 is about 342.0813504141.

Adding to 40030240 its reverse (4203004), we get a palindrome (44233244).

The spelling of 40030240 in words is "forty million, thirty thousand, two hundred forty".