3969878 has 16 divisors (see below), whose sum is σ = 6673104. Its totient is φ = 1755360.

The previous prime is 3969871. The next prime is 3969899. The reversal of 3969878 is 8789693.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969871) 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, 1625 + ... + 3252.

It is an arithmetic number, because the mean of its divisors is an integer number (417069).

Almost surely, 2^3969878 is an apocalyptic number.

3969878 is a deficient number, since it is larger than the sum of its proper divisors (2703226).

3969878 is a wasteful number, since it uses less digits than its factorization.

3969878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4927.

The product of its digits is 653184, while the sum is 50.

The square root of 3969878 is about 1992.4552692595. The cubic root of 3969878 is about 158.3406366591.

The spelling of 3969878 in words is "three million, nine hundred sixty-nine thousand, eight hundred seventy-eight".