3940470840 has 32 divisors (see below), whose sum is σ = 11821412880. Its totient is φ = 1050792192.

The previous prime is 3940470797. The next prime is 3940470847. The reversal of 3940470840 is 480740493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940470847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16418509 + ... + 16418748.

Almost surely, 2^3940470840 is an apocalyptic number.

3940470840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3940470840 is an abundant number, since it is smaller than the sum of its proper divisors (7880942040).

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

3940470840 is a wasteful number, since it uses less digits than its factorization.

3940470840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32837271 (or 32837267 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 3940470840 is about 62773.1697463176. The cubic root of 3940470840 is about 1579.4869401836.

The spelling of 3940470840 in words is "three billion, nine hundred forty million, four hundred seventy thousand, eight hundred forty".