3945404 has 6 divisors (see below), whose sum is σ = 6904464. Its totient is φ = 1972700.

The previous prime is 3945391. The next prime is 3945413. The reversal of 3945404 is 4045493.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493172 + ... + 493179.

It is an arithmetic number, because the mean of its divisors is an integer number (1150744).

Almost surely, 2^3945404 is an apocalyptic number.

It is an amenable number.

3945404 is a deficient number, since it is larger than the sum of its proper divisors (2959060).

3945404 is a wasteful number, since it uses less digits than its factorization.

3945404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986355 (or 986353 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 3945404 is about 1986.3041056193. The cubic root of 3945404 is about 158.0145796512.

The spelling of 3945404 in words is "three million, nine hundred forty-five thousand, four hundred four".