40039456 has 24 divisors (see below), whose sum is σ = 79942464. Its totient is φ = 19736640.

The previous prime is 40039451. The next prime is 40039457. The reversal of 40039456 is 65493004.

It is not an unprimeable number, because it can be changed into a prime (40039451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6540 + ... + 11083.

It is an arithmetic number, because the mean of its divisors is an integer number (3330936).

Almost surely, 2^40039456 is an apocalyptic number.

It is an amenable number.

40039456 is a deficient number, since it is larger than the sum of its proper divisors (39903008).

40039456 is a wasteful number, since it uses less digits than its factorization.

40039456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17704 (or 17696 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 40039456 is about 6327.6738221877. The cubic root of 40039456 is about 342.1076004009.

The spelling of 40039456 in words is "forty million, thirty-nine thousand, four hundred fifty-six".