3878992 has 40 divisors (see below), whose sum is σ = 8577576. Its totient is φ = 1683456.

The previous prime is 3878981. The next prime is 3878993. The reversal of 3878992 is 2998783.

It can be written as a sum of positive squares in 4 ways, for example, as 207936 + 3671056 = 456^2 + 1916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2988 + ... + 4084.

Almost surely, 2^3878992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4288788).

3878992 is an abundant number, since it is smaller than the sum of its proper divisors (4698584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3878992 is a wasteful number, since it uses less digits than its factorization.

3878992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1129 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 3878992 is about 1969.5156765053. The cubic root of 3878992 is about 157.1229512763.

The spelling of 3878992 in words is "three million, eight hundred seventy-eight thousand, nine hundred ninety-two".