2770729 has 4 divisors (see below), whose sum is σ = 2983876. Its totient is φ = 2557584.

The previous prime is 2770723. The next prime is 2770753. The reversal of 2770729 is 9270772.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 565504 + 2205225 = 752^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2770729 - 2⁹ = 2770217 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2770694 and 2770703.

It is not an unprimeable number, because it can be changed into a prime (2770723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106554 + ... + 106579.

It is an arithmetic number, because the mean of its divisors is an integer number (745969).

2^2770729 is an apocalyptic number.

It is an amenable number.

2770729 is a deficient number, since it is larger than the sum of its proper divisors (213147).

2770729 is a wasteful number, since it uses less digits than its factorization.

2770729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213146.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 2770729 is about 1664.5506901263. The cubic root of 2770729 is about 140.4531067782.

It can be divided in two parts, 27 and 70729, that added together give a square (70756 = 266²).

The spelling of 2770729 in words is "two million, seven hundred seventy thousand, seven hundred twenty-nine".