2878381 has 16 divisors (see below), whose sum is σ = 3391488. Its totient is φ = 2415600.

The previous prime is 2878373. The next prime is 2878391. The reversal of 2878381 is 1838782.

It is not a de Polignac number, because 2878381 - 2³ = 2878373 is a prime.

It is a super-2 number, since 2×2878381² = 16570154362322, which contains 22 as substring.

2878381 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2878381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7660 + ... + 8026.

It is an arithmetic number, because the mean of its divisors is an integer number (211968).

2^2878381 is an apocalyptic number.

It is an amenable number.

2878381 is a deficient number, since it is larger than the sum of its proper divisors (513107).

2878381 is a wasteful number, since it uses less digits than its factorization.

2878381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its digits is 21504, while the sum is 37.

The square root of 2878381 is about 1696.5792053423. The cubic root of 2878381 is about 142.2490669496.

It can be divided in two parts, 287 and 8381, that added together give a palindrome (8668).

The spelling of 2878381 in words is "two million, eight hundred seventy-eight thousand, three hundred eighty-one".