2720266 has 16 divisors (see below), whose sum is σ = 4270464. Its totient is φ = 1298304.

The previous prime is 2720251. The next prime is 2720269. The reversal of 2720266 is 6620272.

It is a happy number.

It is a super-2 number, since 2×2720266² = 14799694221512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2720266.

It is not an unprimeable number, because it can be changed into a prime (2720269) 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 in 7 ways as a sum of consecutive naturals, for example, 3706 + ... + 4378.

It is an arithmetic number, because the mean of its divisors is an integer number (266904).

2^2720266 is an apocalyptic number.

2720266 is a deficient number, since it is larger than the sum of its proper divisors (1550198).

2720266 is a wasteful number, since it uses less digits than its factorization.

2720266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 2720266 is about 1649.3228913709. The cubic root of 2720266 is about 139.5951911710.

The spelling of 2720266 in words is "two million, seven hundred twenty thousand, two hundred sixty-six".