2328781 has 16 divisors (see below), whose sum is σ = 2902144. Its totient is φ = 1819584.

The previous prime is 2328769. The next prime is 2328791. The reversal of 2328781 is 1878232.

It is not a de Polignac number, because 2328781 - 2⁷ = 2328653 is a prime.

It is a super-2 number, since 2×2328781² = 10846441891922, which contains 22 as substring.

2328781 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2328761) 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, 14206 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (181384).

2^2328781 is an apocalyptic number.

It is an amenable number.

2328781 is a deficient number, since it is larger than the sum of its proper divisors (573363).

2328781 is a wasteful number, since it uses less digits than its factorization.

2328781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340.

The product of its digits is 5376, while the sum is 31.

The square root of 2328781 is about 1526.0344032819. The cubic root of 2328781 is about 132.5489269885.

The spelling of 2328781 in words is "two million, three hundred twenty-eight thousand, seven hundred eighty-one".