426978 has 16 divisors (see below), whose sum is σ = 948960. Its totient is φ = 142308.

The previous prime is 426973. The next prime is 426997. The reversal of 426978 is 879624.

It is a d-powerful number, because it can be written as 4⁹ + 2⁹ + 9 + 6⁶ + 7⁶ + 8 .

It is not an unprimeable number, because it can be changed into a prime (426971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3900 + ... + 4007.

It is an arithmetic number, because the mean of its divisors is an integer number (59310).

2⁴²⁶⁹⁷⁸ is an apocalyptic number.

426978 is an abundant number, since it is smaller than the sum of its proper divisors (521982).

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

426978 is a wasteful number, since it uses less digits than its factorization.

426978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7918 (or 7912 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 426978 is about 653.4355362237. The cubic root of 426978 is about 75.3011888512.

The spelling of 426978 in words is "four hundred twenty-six thousand, nine hundred seventy-eight".