40039660 has 24 divisors (see below), whose sum is σ = 84954240. Its totient is φ = 15849984.

The previous prime is 40039651. The next prime is 40039663. The reversal of 40039660 is 6693004.

It is not an unprimeable number, because it can be changed into a prime (40039663) 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, 8380 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (3539760).

Almost surely, 2^40039660 is an apocalyptic number.

It is an amenable number.

40039660 is an abundant number, since it is smaller than the sum of its proper divisors (44914580).

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

40039660 is a wasteful number, since it uses less digits than its factorization.

40039660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20745 (or 20743 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 40039660 is about 6327.6899418350. The cubic root of 40039660 is about 342.1081814098.

The spelling of 40039660 in words is "forty million, thirty-nine thousand, six hundred sixty".