40004440 has 32 divisors (see below), whose sum is σ = 102869280. Its totient is φ = 13715712.

The previous prime is 40004413. The next prime is 40004467. The reversal of 40004440 is 4440004.

It is an interprime number because it is at equal distance from previous prime (40004413) and next prime (40004467).

40004440 is a modest number, since divided by 4440 gives 40 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71157 + ... + 71716.

It is an arithmetic number, because the mean of its divisors is an integer number (3214665).

Almost surely, 2^40004440 is an apocalyptic number.

40004440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40004440 is an abundant number, since it is smaller than the sum of its proper divisors (62864840).

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

40004440 is a wasteful number, since it uses less digits than its factorization.

40004440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142891 (or 142887 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40004440 is about 6324.9063234170. The cubic root of 40004440 is about 342.0078426892.

Adding to 40004440 its reverse (4440004), we get a palindrome (44444444).

The spelling of 40004440 in words is "forty million, four thousand, four hundred forty".