2078765 has 8 divisors (see below), whose sum is σ = 2686488. Its totient is φ = 1535040.

The previous prime is 2078759. The next prime is 2078779. The reversal of 2078765 is 5678702.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 2036329 = 206^2 + 1427^2 .

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

It is not a de Polignac number, because 2078765 - 2⁸ = 2078509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15926 + ... + 16055.

It is an arithmetic number, because the mean of its divisors is an integer number (335811).

2^2078765 is an apocalyptic number.

It is an amenable number.

2078765 is a deficient number, since it is larger than the sum of its proper divisors (607723).

2078765 is a wasteful number, since it uses less digits than its factorization.

2078765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31999.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2078765 is about 1441.7922873979. The cubic root of 2078765 is about 127.6248168958.

The spelling of 2078765 in words is "two million, seventy-eight thousand, seven hundred sixty-five".