3878731 has 4 divisors (see below), whose sum is σ = 3895200. Its totient is φ = 3862264.

The previous prime is 3878713. The next prime is 3878741. The reversal of 3878731 is 1378783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3878731 - 2⁹ = 3878219 is a prime.

It is a super-2 number, since 2×3878731² = 30089108340722, which contains 22 as substring.

It is a Duffinian number.

3878731 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3878701) 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, 7876 + ... + 8353.

It is an arithmetic number, because the mean of its divisors is an integer number (973800).

Almost surely, 2^3878731 is an apocalyptic number.

3878731 is a deficient number, since it is larger than the sum of its proper divisors (16469).

3878731 is a wasteful number, since it uses less digits than its factorization.

3878731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16468.

The product of its digits is 28224, while the sum is 37.

The square root of 3878731 is about 1969.4494154458. The cubic root of 3878731 is about 157.1194271640.

The spelling of 3878731 in words is "three million, eight hundred seventy-eight thousand, seven hundred thirty-one".