2721894 has 32 divisors (see below), whose sum is σ = 6270720. Its totient is φ = 771552.

The previous prime is 2721877. The next prime is 2721899. The reversal of 2721894 is 4981272.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9477 + ... + 9759.

It is an arithmetic number, because the mean of its divisors is an integer number (195960).

2^2721894 is an apocalyptic number.

2721894 is an abundant number, since it is smaller than the sum of its proper divisors (3548826).

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

2721894 is a wasteful number, since it uses less digits than its factorization.

2721894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524.

The product of its digits is 8064, while the sum is 33.

The square root of 2721894 is about 1649.8163534163. The cubic root of 2721894 is about 139.6230335034.

The spelling of 2721894 in words is "two million, seven hundred twenty-one thousand, eight hundred ninety-four".