3878531 has 4 divisors (see below), whose sum is σ = 3922200. Its totient is φ = 3834864.

The previous prime is 3878521. The next prime is 3878543. The reversal of 3878531 is 1358783.

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 3878531 - 2¹⁰ = 3877507 is a prime.

It is a super-2 number, since 2×3878531² = 30086005435922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3878491 and 3878500.

It is not an unprimeable number, because it can be changed into a prime (3878521) 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, 21701 + ... + 21878.

It is an arithmetic number, because the mean of its divisors is an integer number (980550).

Almost surely, 2^3878531 is an apocalyptic number.

3878531 is a deficient number, since it is larger than the sum of its proper divisors (43669).

3878531 is an equidigital number, since it uses as much as digits as its factorization.

3878531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43668.

The product of its digits is 20160, while the sum is 35.

The square root of 3878531 is about 1969.3986391790. The cubic root of 3878531 is about 157.1167265878.

The spelling of 3878531 in words is "three million, eight hundred seventy-eight thousand, five hundred thirty-one".