4256778 has 16 divisors (see below), whose sum is σ = 8641440. Its totient is φ = 1397616.

The previous prime is 4256761. The next prime is 4256797. The reversal of 4256778 is 8776524.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4893 + ... + 5696.

It is an arithmetic number, because the mean of its divisors is an integer number (540090).

Almost surely, 2^4256778 is an apocalyptic number.

4256778 is an abundant number, since it is smaller than the sum of its proper divisors (4384662).

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

4256778 is a wasteful number, since it uses less digits than its factorization.

4256778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661.

The product of its digits is 94080, while the sum is 39.

The square root of 4256778 is about 2063.1960643623. The cubic root of 4256778 is about 162.0666544797.

The spelling of 4256778 in words is "four million, two hundred fifty-six thousand, seven hundred seventy-eight".