2730861 has 16 divisors (see below), whose sum is σ = 4624000. Its totient is φ = 1560384.

The previous prime is 2730823. The next prime is 2730869. The reversal of 2730861 is 1680372.

It is not a de Polignac number, because 2730861 - 2⁶ = 2730797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (2730869) 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 15 ways as a sum of consecutive naturals, for example, 7036 + ... + 7413.

It is an arithmetic number, because the mean of its divisors is an integer number (289000).

2^2730861 is an apocalyptic number.

2730861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2730861 is a deficient number, since it is larger than the sum of its proper divisors (1893139).

2730861 is a wasteful number, since it uses less digits than its factorization.

2730861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14465 (or 14459 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2730861 is about 1652.5316940985. The cubic root of 2730861 is about 139.7761900175.

The spelling of 2730861 in words is "two million, seven hundred thirty thousand, eight hundred sixty-one".