40036240 has 40 divisors (see below), whose sum is σ = 96299640. Its totient is φ = 15461376.

The previous prime is 40036189. The next prime is 40036247. The reversal of 40036240 is 4263004.

It can be written as a sum of positive squares in 4 ways, for example, as 43264 + 39992976 = 208^2 + 6324^2 .

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 (40036247) 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, 6309 + ... + 10948.

It is an arithmetic number, because the mean of its divisors is an integer number (2407491).

Almost surely, 2^40036240 is an apocalyptic number.

40036240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40036240 is an abundant number, since it is smaller than the sum of its proper divisors (56263400).

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

40036240 is a wasteful number, since it uses less digits than its factorization.

40036240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17299 (or 17293 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40036240 is about 6327.4196952628. The cubic root of 40036240 is about 342.0984407069.

Adding to 40036240 its reverse (4263004), we get a palindrome (44299244).

The spelling of 40036240 in words is "forty million, thirty-six thousand, two hundred forty".