3949940 has 24 divisors (see below), whose sum is σ = 8498952. Its totient is φ = 1541120.

The previous prime is 3949919. The next prime is 3949961. The reversal of 3949940 is 499493.

3949940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3949919) and next prime (3949961).

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 3794704 = 394^2 + 1948^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3949894 and 3949903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589 + ... + 3228.

It is an arithmetic number, because the mean of its divisors is an integer number (354123).

Almost surely, 2^3949940 is an apocalyptic number.

It is an amenable number.

3949940 is an abundant number, since it is smaller than the sum of its proper divisors (4549012).

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

3949940 is a wasteful number, since it uses less digits than its factorization.

3949940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4867 (or 4865 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 3949940 is about 1987.4455967397. The cubic root of 3949940 is about 158.0751124996.

The spelling of 3949940 in words is "three million, nine hundred forty-nine thousand, nine hundred forty".