2731904 has 32 divisors (see below), whose sum is σ = 6222000. Its totient is φ = 1170432.

The previous prime is 2731903. The next prime is 2731907. The reversal of 2731904 is 4091372.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629 + ... + 2420.

2^2731904 is an apocalyptic number.

It is an amenable number.

2731904 is an abundant number, since it is smaller than the sum of its proper divisors (3490096).

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

2731904 is an equidigital number, since it uses as much as digits as its factorization.

2731904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070 (or 3058 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2731904 is about 1652.8472403704. The cubic root of 2731904 is about 139.7939826978.

The spelling of 2731904 in words is "two million, seven hundred thirty-one thousand, nine hundred four".