3968890 has 16 divisors (see below), whose sum is σ = 7198632. Its totient is φ = 1575424.

The previous prime is 3968873. The next prime is 3968893. The reversal of 3968890 is 988693.

It can be written as a sum of positive squares in 4 ways, for example, as 2550409 + 1418481 = 1597^2 + 1191^2 .

It is not an unprimeable number, because it can be changed into a prime (3968893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79 + ... + 2818.

Almost surely, 2^3968890 is an apocalyptic number.

3968890 is a deficient number, since it is larger than the sum of its proper divisors (3229742).

3968890 is a wasteful number, since it uses less digits than its factorization.

3968890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3968890 is about 1992.2073185289. The cubic root of 3968890 is about 158.3274999390.

The spelling of 3968890 in words is "three million, nine hundred sixty-eight thousand, eight hundred ninety".