628478 has 4 divisors (see below), whose sum is σ = 942720. Its totient is φ = 314238.

The previous prime is 628477. The next prime is 628487. The reversal of 628478 is 874826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874826 = 2 ⋅437413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157118 + ... + 157121.

It is an arithmetic number, because the mean of its divisors is an integer number (235680).

2⁶²⁸⁴⁷⁸ is an apocalyptic number.

628478 is a deficient number, since it is larger than the sum of its proper divisors (314242).

628478 is a wasteful number, since it uses less digits than its factorization.

628478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314241.

The product of its digits is 21504, while the sum is 35.

The square root of 628478 is about 792.7660436724. The cubic root of 628478 is about 85.6570986267.

The spelling of 628478 in words is "six hundred twenty-eight thousand, four hundred seventy-eight".