40034440 has 16 divisors (see below), whose sum is σ = 90077580. Its totient is φ = 16013760.

The previous prime is 40034437. The next prime is 40034447. The reversal of 40034440 is 4443004.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 3818116 = 6018^2 + 1954^2 .

It is a super-2 number, since 2×40034440² = 3205512772227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40034447) 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, 500391 + ... + 500470.

Almost surely, 2^40034440 is an apocalyptic number.

40034440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40034440 is an abundant number, since it is smaller than the sum of its proper divisors (50043140).

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

40034440 is a wasteful number, since it uses less digits than its factorization.

40034440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000872 (or 1000868 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 40034440 is about 6327.2774555886. The cubic root of 40034440 is about 342.0933137983.

Adding to 40034440 its reverse (4443004), we get a palindrome (44477444).

The spelling of 40034440 in words is "forty million, thirty-four thousand, four hundred forty".