2731406 has 4 divisors (see below), whose sum is σ = 4097112. Its totient is φ = 1365702.

The previous prime is 2731381. The next prime is 2731427. The reversal of 2731406 is 6041372.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682850 + ... + 682853.

It is an arithmetic number, because the mean of its divisors is an integer number (1024278).

2^2731406 is an apocalyptic number.

2731406 is a deficient number, since it is larger than the sum of its proper divisors (1365706).

2731406 is a wasteful number, since it uses less digits than its factorization.

2731406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365705.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 2731406 is about 1652.6965843736. The cubic root of 2731406 is about 139.7854878124.

Adding to 2731406 its reverse (6041372), we get a palindrome (8772778).

The spelling of 2731406 in words is "two million, seven hundred thirty-one thousand, four hundred six".