2731000 has 32 divisors (see below), whose sum is σ = 6392880. Its totient is φ = 1092000.

The previous prime is 2730991. The next prime is 2731013. The reversal of 2731000 is 1372.

It is a super-2 number, since 2×2731000² = 14916722000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 366 + ... + 2365.

2^2731000 is an apocalyptic number.

2731000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2731000 is an abundant number, since it is smaller than the sum of its proper divisors (3661880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2731000 is a wasteful number, since it uses less digits than its factorization.

2731000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 13.

The square root of 2731000 is about 1652.5737502454. The cubic root of 2731000 is about 139.7785614992.

Adding to 2731000 its reverse (1372), we get a palindrome (2732372).

The spelling of 2731000 in words is "two million, seven hundred thirty-one thousand".