2559978 has 16 divisors (see below), whose sum is σ = 5688960. Its totient is φ = 853308.

The previous prime is 2559959. The next prime is 2559983. The reversal of 2559978 is 8799552.

It is a happy number.

2559978 is a `hidden beast` number, since 2 + 559 + 97 + 8 = 666.

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, 23650 + ... + 23757.

It is an arithmetic number, because the mean of its divisors is an integer number (355560).

2^2559978 is an apocalyptic number.

2559978 is an abundant number, since it is smaller than the sum of its proper divisors (3128982).

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

2559978 is a wasteful number, since it uses less digits than its factorization.

2559978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47418 (or 47412 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 2559978 is about 1599.9931249852. The cubic root of 2559978 is about 136.7976838635.

The spelling of 2559978 in words is "two million, five hundred fifty-nine thousand, nine hundred seventy-eight".