40340240 has 40 divisors (see below), whose sum is σ = 94165848. Its totient is φ = 16071680.

The previous prime is 40340239. The next prime is 40340243. The reversal of 40340240 is 4204304.

It can be written as a sum of positive squares in 4 ways, for example, as 17606416 + 22733824 = 4196^2 + 4768^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (40340243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22580 + ... + 24300.

Almost surely, 2^40340240 is an apocalyptic number.

40340240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40340240 is an abundant number, since it is smaller than the sum of its proper divisors (53825608).

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

40340240 is a wasteful number, since it uses less digits than its factorization.

40340240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 40340240 is about 6351.3966967904. The cubic root of 40340240 is about 342.9621232757.

Adding to 40340240 its reverse (4204304), we get a palindrome (44544544).

The spelling of 40340240 in words is "forty million, three hundred forty thousand, two hundred forty".