3973840040 has 16 divisors (see below), whose sum is σ = 8941140180. Its totient is φ = 1589536000.

The previous prime is 3973840037. The next prime is 3973840093. The reversal of 3973840040 is 400483793.

It can be written as a sum of positive squares in 2 ways, for example, as 3848713444 + 125126596 = 62038^2 + 11186^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3973839976 and 3973840003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49672961 + ... + 49673040.

Almost surely, 2^3973840040 is an apocalyptic number.

It is an amenable number.

3973840040 is an abundant number, since it is smaller than the sum of its proper divisors (4967300140).

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

3973840040 is a wasteful number, since it uses less digits than its factorization.

3973840040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99346012 (or 99346008 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 3973840040 is about 63038.4013122160. The cubic root of 3973840040 is about 1583.9329514949.

The spelling of 3973840040 in words is "three billion, nine hundred seventy-three million, eight hundred forty thousand, forty".