40344540 has 48 divisors (see below), whose sum is σ = 113248800. Its totient is φ = 10731520.

The previous prime is 40344523. The next prime is 40344559. The reversal of 40344540 is 4544304.

It is a self number, because there is not a number n which added to its sum of digits gives 40344540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37936 + ... + 38984.

It is an arithmetic number, because the mean of its divisors is an integer number (2359350).

Almost surely, 2^40344540 is an apocalyptic number.

It is an amenable number.

40344540 is an abundant number, since it is smaller than the sum of its proper divisors (72904260).

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

40344540 is a wasteful number, since it uses less digits than its factorization.

40344540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1700 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 40344540 is about 6351.7351959917. The cubic root of 40344540 is about 342.9743086663.

Adding to 40344540 its reverse (4544304), we get a palindrome (44888844).

The spelling of 40344540 in words is "forty million, three hundred forty-four thousand, five hundred forty".