3945388 has 12 divisors (see below), whose sum is σ = 7267960. Its totient is φ = 1868832.

The previous prime is 3945367. The next prime is 3945391. The reversal of 3945388 is 8835493.

It is a self number, because there is not a number n which added to its sum of digits gives 3945388.

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, 25881 + ... + 26032.

Almost surely, 2^3945388 is an apocalyptic number.

3945388 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

3945388 is a deficient number, since it is larger than the sum of its proper divisors (3322572).

3945388 is a wasteful number, since it uses less digits than its factorization.

3945388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51936 (or 51934 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 3945388 is about 1986.3000780345. The cubic root of 3945388 is about 158.0143660494.

The spelling of 3945388 in words is "three million, nine hundred forty-five thousand, three hundred eighty-eight".