2720655 has 32 divisors (see below), whose sum is σ = 5529600. Its totient is φ = 1243296.

The previous prime is 2720623. The next prime is 2720671. The reversal of 2720655 is 5560272.

2720655 is a `hidden beast` number, since 2 + 7 + 2 + 0 + 655 = 666.

2720655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2720655 - 2⁵ = 2720623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495 + ... + 2384.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

2^2720655 is an apocalyptic number.

2720655 is an abundant number, since it is smaller than the sum of its proper divisors (2808945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2720655 is a wasteful number, since it uses less digits than its factorization.

2720655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900 (or 2894 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 2720655 is about 1649.4408143368. The cubic root of 2720655 is about 139.6018449249.

It can be divided in two parts, 27206 and 55, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 2720655 in words is "two million, seven hundred twenty thousand, six hundred fifty-five".