2730831 has 4 divisors (see below), whose sum is σ = 3641112. Its totient is φ = 1820552.

The previous prime is 2730823. The next prime is 2730869. The reversal of 2730831 is 1380372.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2730831 - 2³ = 2730823 is a prime.

It is a super-2 number, since 2×2730831² = 14914875901122, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2730811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455136 + ... + 455141.

It is an arithmetic number, because the mean of its divisors is an integer number (910278).

2^2730831 is an apocalyptic number.

2730831 is a deficient number, since it is larger than the sum of its proper divisors (910281).

2730831 is an equidigital number, since it uses as much as digits as its factorization.

2730831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910280.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 2730831 is about 1652.5226170918. The cubic root of 2730831 is about 139.7756781764.

The spelling of 2730831 in words is "two million, seven hundred thirty thousand, eight hundred thirty-one".