3878289 has 6 divisors (see below), whose sum is σ = 5601986. Its totient is φ = 2585520.

The previous prime is 3878279. The next prime is 3878291. The reversal of 3878289 is 9828783.

It can be written as a sum of positive squares in only one way, i.e., 3359889 + 518400 = 1833^2 + 720^2 .

It is not a de Polignac number, because 3878289 - 2¹² = 3874193 is a prime.

It is a super-2 number, since 2×3878289² = 30082251135042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215452 + ... + 215469.

Almost surely, 2^3878289 is an apocalyptic number.

It is an amenable number.

3878289 is a deficient number, since it is larger than the sum of its proper divisors (1723697).

3878289 is a wasteful number, since it uses less digits than its factorization.

3878289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430927 (or 430924 counting only the distinct ones).

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

The square root of 3878289 is about 1969.3371981456. The cubic root of 3878289 is about 157.1134587665.

The spelling of 3878289 in words is "three million, eight hundred seventy-eight thousand, two hundred eighty-nine".