3878739 has 16 divisors (see below), whose sum is σ = 5809440. Its totient is φ = 2557440.

The previous prime is 3878713. The next prime is 3878741. The reversal of 3878739 is 9378783.

It is a de Polignac number, because none of the positive numbers 2^k-3878739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3878694 and 3878703.

It is not an unprimeable number, because it can be changed into a prime (3878759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1879 + ... + 3359.

It is an arithmetic number, because the mean of its divisors is an integer number (363090).

Almost surely, 2^3878739 is an apocalyptic number.

3878739 is a deficient number, since it is larger than the sum of its proper divisors (1930701).

3878739 is a wasteful number, since it uses less digits than its factorization.

3878739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1581 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 3878739 is about 1969.4514464693. The cubic root of 3878739 is about 157.1195351851.

The spelling of 3878739 in words is "three million, eight hundred seventy-eight thousand, seven hundred thirty-nine".