2721878 has 16 divisors (see below), whose sum is σ = 4202016. Its totient is φ = 1321920.

The previous prime is 2721877. The next prime is 2721899. The reversal of 2721878 is 8781272.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14948 + ... + 15128.

It is an arithmetic number, because the mean of its divisors is an integer number (262626).

2^2721878 is an apocalyptic number.

2721878 is a deficient number, since it is larger than the sum of its proper divisors (1480138).

2721878 is a wasteful number, since it uses less digits than its factorization.

2721878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its digits is 12544, while the sum is 35.

The square root of 2721878 is about 1649.8115043847. The cubic root of 2721878 is about 139.6227599227.

The spelling of 2721878 in words is "two million, seven hundred twenty-one thousand, eight hundred seventy-eight".