2864381 has 12 divisors (see below), whose sum is σ = 3287412. Its totient is φ = 2486016.

The previous prime is 2864371. The next prime is 2864401. The reversal of 2864381 is 1834682.

It can be written as a sum of positive squares in 6 ways, for example, as 4900 + 2859481 = 70^2 + 1691^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2864381 is a prime.

It is a super-2 number, since 2×2864381² = 16409357026322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2864341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2375 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (273951).

2^2864381 is an apocalyptic number.

It is an amenable number.

2864381 is a deficient number, since it is larger than the sum of its proper divisors (423031).

2864381 is a wasteful number, since it uses less digits than its factorization.

2864381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040 (or 1027 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 2864381 is about 1692.4482266823. The cubic root of 2864381 is about 142.0180662063.

The spelling of 2864381 in words is "two million, eight hundred sixty-four thousand, three hundred eighty-one".