3940443940 has 24 divisors (see below), whose sum is σ = 8761693752. Its totient is φ = 1483461120.

The previous prime is 3940443937. The next prime is 3940443943. The reversal of 3940443940 is 493440493.

It is an interprime number because it is at equal distance from previous prime (3940443937) and next prime (3940443943).

It can be written as a sum of positive squares in 4 ways, for example, as 1755442404 + 2185001536 = 41898^2 + 46744^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3940443893 and 3940443902.

It is not an unprimeable number, because it can be changed into a prime (3940443943) 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, 5794431 + ... + 5795110.

It is an arithmetic number, because the mean of its divisors is an integer number (365070573).

Almost surely, 2^3940443940 is an apocalyptic number.

It is an amenable number.

3940443940 is an abundant number, since it is smaller than the sum of its proper divisors (4821249812).

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

3940443940 is a wasteful number, since it uses less digits than its factorization.

3940443940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589567 (or 11589565 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 3940443940 is about 62772.9554824369. The cubic root of 3940443940 is about 1579.4833460027.

The spelling of 3940443940 in words is "three billion, nine hundred forty million, four hundred forty-three thousand, nine hundred forty".