40035640 has 32 divisors (see below), whose sum is σ = 93998880. Its totient is φ = 15317632.

The previous prime is 40035637. The next prime is 40035659. The reversal of 40035640 is 4653004.

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, 20839 + ... + 22678.

It is an arithmetic number, because the mean of its divisors is an integer number (2937465).

Almost surely, 2^40035640 is an apocalyptic number.

40035640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40035640 is an abundant number, since it is smaller than the sum of its proper divisors (53963240).

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

40035640 is a wasteful number, since it uses less digits than its factorization.

40035640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43551 (or 43547 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40035640 is about 6327.3722823934. The cubic root of 40035640 is about 342.0967317544.

Adding to 40035640 its reverse (4653004), we get a palindrome (44688644).

The spelling of 40035640 in words is "forty million, thirty-five thousand, six hundred forty".