426778 has 16 divisors (see below), whose sum is σ = 735840. Its totient is φ = 183600.

The previous prime is 426773. The next prime is 426779. The reversal of 426778 is 877624.

426778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×426778² = 364278922568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (426773) by changing a digit.

426778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (45990).

2⁴²⁶⁷⁷⁸ is an apocalyptic number.

426778 is a deficient number, since it is larger than the sum of its proper divisors (309062).

426778 is a wasteful number, since it uses less digits than its factorization.

426778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053.

The product of its digits is 18816, while the sum is 34.

The square root of 426778 is about 653.2824810141. The cubic root of 426778 is about 75.2894297834.

The spelling of 426778 in words is "four hundred twenty-six thousand, seven hundred seventy-eight".