428378 has 4 divisors (see below), whose sum is σ = 642570. Its totient is φ = 214188.

The previous prime is 428369. The next prime is 428401. The reversal of 428378 is 873824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 351649 + 76729 = 593^2 + 277^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107093 + ... + 107096.

2⁴²⁸³⁷⁸ is an apocalyptic number.

428378 is a deficient number, since it is larger than the sum of its proper divisors (214192).

428378 is a wasteful number, since it uses less digits than its factorization.

428378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214191.

The product of its digits is 10752, while the sum is 32.

The square root of 428378 is about 654.5059205233. The cubic root of 428378 is about 75.3833996856.

It can be divided in two parts, 4 and 28378, that added together give a palindrome (28382).

The spelling of 428378 in words is "four hundred twenty-eight thousand, three hundred seventy-eight".