2277978 has 8 divisors (see below), whose sum is σ = 4555968. Its totient is φ = 759324.

The previous prime is 2277941. The next prime is 2278007. The reversal of 2277978 is 8797722.

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

2277978 is an admirable number.

It is a d-powerful number, because it can be written as 2¹⁷ + 2²¹ + 7² + 7² + 9² + 7⁵ + 8⁵ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189826 + ... + 189837.

It is an arithmetic number, because the mean of its divisors is an integer number (569496).

2^2277978 is an apocalyptic number.

2277978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2277978 is a wasteful number, since it uses less digits than its factorization.

2277978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379668.

The product of its digits is 98784, while the sum is 42.

The square root of 2277978 is about 1509.2971874353. The cubic root of 2277978 is about 131.5779679983.

The spelling of 2277978 in words is "two million, two hundred seventy-seven thousand, nine hundred seventy-eight".