2255978 has 8 divisors (see below), whose sum is σ = 3531168. Its totient is φ = 1078924.

The previous prime is 2255971. The next prime is 2255987. The reversal of 2255978 is 8795522.

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

It is a d-powerful number, because it can be written as 2¹¹ + 2²¹ + 5⁷ + 5⁷ + 9 + 7 + 8³ .

It is not an unprimeable number, because it can be changed into a prime (2255971) 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, 24476 + ... + 24567.

It is an arithmetic number, because the mean of its divisors is an integer number (441396).

2^2255978 is an apocalyptic number.

2255978 is a deficient number, since it is larger than the sum of its proper divisors (1275190).

2255978 is a wasteful number, since it uses less digits than its factorization.

2255978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49068.

The product of its digits is 50400, while the sum is 38.

The square root of 2255978 is about 1501.9913448486. The cubic root of 2255978 is about 131.1530173958.

The spelling of 2255978 in words is "two million, two hundred fifty-five thousand, nine hundred seventy-eight".