2778265 has 8 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 1905072.

The previous prime is 2778263. The next prime is 2778277. The reversal of 2778265 is 5628772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778265 - 2¹ = 2778263 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 7² + 7⁷ + 8⁴ + 2¹⁸ + 6⁸ + 5⁴ .

It is not an unprimeable number, because it can be changed into a prime (2778263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39655 + ... + 39724.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

2^2778265 is an apocalyptic number.

It is an amenable number.

2778265 is a deficient number, since it is larger than the sum of its proper divisors (1031975).

2778265 is an equidigital number, since it uses as much as digits as its factorization.

2778265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79391.

The product of its digits is 47040, while the sum is 37.

The square root of 2778265 is about 1666.8128269245. The cubic root of 2778265 is about 140.5803291859.

The spelling of 2778265 in words is "two million, seven hundred seventy-eight thousand, two hundred sixty-five".