2723906 has 4 divisors (see below), whose sum is σ = 4085862. Its totient is φ = 1361952.

The previous prime is 2723887. The next prime is 2723909. The reversal of 2723906 is 6093272.

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

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 1343281 = 1175^2 + 1159^2 .

It is not an unprimeable number, because it can be changed into a prime (2723909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680975 + ... + 680978.

2^2723906 is an apocalyptic number.

2723906 is a deficient number, since it is larger than the sum of its proper divisors (1361956).

2723906 is a wasteful number, since it uses less digits than its factorization.

2723906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361955.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 2723906 is about 1650.4260056119. The cubic root of 2723906 is about 139.6574277344.

The spelling of 2723906 in words is "two million, seven hundred twenty-three thousand, nine hundred six".