428978 has 32 divisors (see below), whose sum is σ = 787968. Its totient is φ = 172800.

The previous prime is 428977. The next prime is 429007. The reversal of 428978 is 879824.

It is a d-powerful number, because it can be written as 4⁹ + 2¹⁷ + 9² + 8³ + 7⁴ + 8⁵ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11576 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (24624).

2⁴²⁸⁹⁷⁸ is an apocalyptic number.

428978 is a deficient number, since it is larger than the sum of its proper divisors (358990).

428978 is a wasteful number, since it uses less digits than its factorization.

428978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98.

The product of its digits is 32256, while the sum is 38.

The square root of 428978 is about 654.9641211547. The cubic root of 428978 is about 75.4185780712.

It can be divided in two parts, 4 and 28978, that added together give a palindrome (28982).

The spelling of 428978 in words is "four hundred twenty-eight thousand, nine hundred seventy-eight".