3969928 has 16 divisors (see below), whose sum is σ = 7464780. Its totient is φ = 1979328.

The previous prime is 3969923. The next prime is 3969937. The reversal of 3969928 is 8299693.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2427364 + 1542564 = 1558^2 + 1242^2 .

It is not an unprimeable number, because it can be changed into a prime (3969923) 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, 5050 + ... + 5782.

Almost surely, 2^3969928 is an apocalyptic number.

It is an amenable number.

3969928 is a deficient number, since it is larger than the sum of its proper divisors (3494852).

3969928 is a wasteful number, since it uses less digits than its factorization.

3969928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 1412 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 3969928 is about 1992.4678165531. The cubic root of 3969928 is about 158.3413014149.

The spelling of 3969928 in words is "three million, nine hundred sixty-nine thousand, nine hundred twenty-eight".