40040480 has 24 divisors (see below), whose sum is σ = 94596012. Its totient is φ = 16016128.

The previous prime is 40040471. The next prime is 40040489. The reversal of 40040480 is 8404004.

It is an interprime number because it is at equal distance from previous prime (40040471) and next prime (40040489).

It can be written as a sum of positive squares in 2 ways, for example, as 34527376 + 5513104 = 5876^2 + 2348^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (40040489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124967 + ... + 125286.

Almost surely, 2^40040480 is an apocalyptic number.

40040480 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40040480 is an abundant number, since it is smaller than the sum of its proper divisors (54555532).

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

40040480 is a wasteful number, since it uses less digits than its factorization.

40040480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250268 (or 250260 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 40040480 is about 6327.7547360814. The cubic root of 40040480 is about 342.1105168175.

Adding to 40040480 its reverse (8404004), we get a palindrome (48444484).

The spelling of 40040480 in words is "forty million, forty thousand, four hundred eighty".