3872889 has 18 divisors (see below), whose sum is σ = 5946590. Its totient is φ = 2428416.

The previous prime is 3872887. The next prime is 3872893. The reversal of 3872889 is 9882783.

It can be written as a sum of positive squares in 3 ways, for example, as 1010025 + 2862864 = 1005^2 + 1692^2 .

It is not a de Polignac number, because 3872889 - 2¹ = 3872887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3872887) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1857 + ... + 3345.

Almost surely, 2^3872889 is an apocalyptic number.

It is an amenable number.

3872889 is a deficient number, since it is larger than the sum of its proper divisors (2073701).

3872889 is a wasteful number, since it uses less digits than its factorization.

3872889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1509 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 3872889 is about 1967.9657009206. The cubic root of 3872889 is about 157.0405050534.

It can be divided in two parts, 3872 and 889, that added together give a square (4761 = 69²).

The spelling of 3872889 in words is "three million, eight hundred seventy-two thousand, eight hundred eighty-nine".