2278705 has 16 divisors (see below), whose sum is σ = 3213504. Its totient is φ = 1529280.

The previous prime is 2278693. The next prime is 2278709. The reversal of 2278705 is 5078722.

It is not a de Polignac number, because 2278705 - 2¹⁷ = 2147633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879 + ... + 2308.

It is an arithmetic number, because the mean of its divisors is an integer number (200844).

2^2278705 is an apocalyptic number.

It is an amenable number.

2278705 is a deficient number, since it is larger than the sum of its proper divisors (934799).

2278705 is a wasteful number, since it uses less digits than its factorization.

2278705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2278705 is about 1509.5380087961. The cubic root of 2278705 is about 131.5919638912.

The spelling of 2278705 in words is "two million, two hundred seventy-eight thousand, seven hundred five".