2721886 has 4 divisors (see below), whose sum is σ = 4082832. Its totient is φ = 1360942.

The previous prime is 2721877. The next prime is 2721899. The reversal of 2721886 is 6881272.

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

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, 680470 + ... + 680473.

It is an arithmetic number, because the mean of its divisors is an integer number (1020708).

2^2721886 is an apocalyptic number.

2721886 is a deficient number, since it is larger than the sum of its proper divisors (1360946).

2721886 is a wasteful number, since it uses less digits than its factorization.

2721886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360945.

The product of its digits is 10752, while the sum is 34.

The square root of 2721886 is about 1649.8139289023. The cubic root of 2721886 is about 139.6228967132.

The spelling of 2721886 in words is "two million, seven hundred twenty-one thousand, eight hundred eighty-six".