2780065 has 8 divisors (see below), whose sum is σ = 3346560. Its totient is φ = 2217072.

The previous prime is 2780053. The next prime is 2780077. The reversal of 2780065 is 5600872.

2780065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2780053) and next prime (2780077).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780065 is a prime.

It is a super-2 number, since 2×2780065² = 15457522808450, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1432 + ... + 2758.

It is an arithmetic number, because the mean of its divisors is an integer number (418320).

2^2780065 is an apocalyptic number.

It is an amenable number.

2780065 is a deficient number, since it is larger than the sum of its proper divisors (566495).

2780065 is a wasteful number, since it uses less digits than its factorization.

2780065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2780065 is about 1667.3526921440. The cubic root of 2780065 is about 140.6106826576.

The spelling of 2780065 in words is "two million, seven hundred eighty thousand, sixty-five".