40035645 has 24 divisors (see below), whose sum is σ = 74734296. Its totient is φ = 19709568.

The previous prime is 40035637. The next prime is 40035659. The reversal of 40035645 is 54653004.

It can be written as a sum of positive squares in 4 ways, for example, as 1172889 + 38862756 = 1083^2 + 6234^2 .

It is not a de Polignac number, because 40035645 - 2³ = 40035637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33634 + ... + 34803.

It is an arithmetic number, because the mean of its divisors is an integer number (3113929).

Almost surely, 2^40035645 is an apocalyptic number.

40035645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40035645 is a deficient number, since it is larger than the sum of its proper divisors (34698651).

40035645 is a wasteful number, since it uses less digits than its factorization.

40035645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68461 (or 68458 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40035645 is about 6327.3726775021. The cubic root of 40035645 is about 342.0967459958.

Adding to 40035645 its reverse (54653004), we get a palindrome (94688649).

The spelling of 40035645 in words is "forty million, thirty-five thousand, six hundred forty-five".