2828381 has 4 divisors (see below), whose sum is σ = 2847264. Its totient is φ = 2809500.

The previous prime is 2828363. The next prime is 2828383. The reversal of 2828381 is 1838282.

2828381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2828381 - 2¹⁸ = 2566237 is a prime.

It is a super-2 number, since 2×2828381² = 15999478162322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2828383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9215 + ... + 9516.

It is an arithmetic number, because the mean of its divisors is an integer number (711816).

2^2828381 is an apocalyptic number.

It is an amenable number.

2828381 is a deficient number, since it is larger than the sum of its proper divisors (18883).

2828381 is a wasteful number, since it uses less digits than its factorization.

2828381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18882.

The product of its digits is 6144, while the sum is 32.

The square root of 2828381 is about 1681.7791174824. The cubic root of 2828381 is about 141.4205874874.

Subtracting from 2828381 its reverse (1838282), we obtain a palindrome (990099).

The spelling of 2828381 in words is "two million, eight hundred twenty-eight thousand, three hundred eighty-one".