3993940 has 12 divisors (see below), whose sum is σ = 8387316. Its totient is φ = 1597568.

The previous prime is 3993911. The next prime is 3993943. The reversal of 3993940 is 493993.

It can be written as a sum of positive squares in 2 ways, for example, as 1522756 + 2471184 = 1234^2 + 1572^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3993940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993943) 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, 99829 + ... + 99868.

It is an arithmetic number, because the mean of its divisors is an integer number (698943).

Almost surely, 2^3993940 is an apocalyptic number.

It is an amenable number.

3993940 is an abundant number, since it is smaller than the sum of its proper divisors (4393376).

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

3993940 is a wasteful number, since it uses less digits than its factorization.

3993940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199706 (or 199704 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 3993940 is about 1998.4844257587. The cubic root of 3993940 is about 158.6599009269.

The spelling of 3993940 in words is "three million, nine hundred ninety-three thousand, nine hundred forty".