2720290 has 8 divisors (see below), whose sum is σ = 4896540. Its totient is φ = 1088112.

The previous prime is 2720273. The next prime is 2720297. The reversal of 2720290 is 920272.

It can be written as a sum of positive squares in 2 ways, for example, as 2719201 + 1089 = 1649^2 + 33^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2720297) 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 3 ways as a sum of consecutive naturals, for example, 136005 + ... + 136024.

2^2720290 is an apocalyptic number.

2720290 is a deficient number, since it is larger than the sum of its proper divisors (2176250).

2720290 is a wasteful number, since it uses less digits than its factorization.

2720290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272036.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 2720290 is about 1649.3301670678. The cubic root of 2720290 is about 139.5956017038.

The spelling of 2720290 in words is "two million, seven hundred twenty thousand, two hundred ninety".