2731998 has 8 divisors (see below), whose sum is σ = 5464008. Its totient is φ = 910664.

The previous prime is 2731997. The next prime is 2732017. The reversal of 2731998 is 8991372.

It is a sphenic number, since it is the product of 3 distinct primes.

2731998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731997) 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, 227661 + ... + 227672.

It is an arithmetic number, because the mean of its divisors is an integer number (683001).

2^2731998 is an apocalyptic number.

2731998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2731998 is a wasteful number, since it uses less digits than its factorization.

2731998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455338.

The product of its digits is 27216, while the sum is 39.

The square root of 2731998 is about 1652.8756759055. The cubic root of 2731998 is about 139.7955860342.

The spelling of 2731998 in words is "two million, seven hundred thirty-one thousand, nine hundred ninety-eight".