628378 has 4 divisors (see below), whose sum is σ = 942570. Its totient is φ = 314188.

The previous prime is 628373. The next prime is 628379. The reversal of 628378 is 873826.

It is a happy number.

628378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873826 = 2 ⋅436913.

It can be written as a sum of positive squares in only one way, i.e., 603729 + 24649 = 777^2 + 157^2 .

It is not an unprimeable number, because it can be changed into a prime (628373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157093 + ... + 157096.

2⁶²⁸³⁷⁸ is an apocalyptic number.

628378 is a deficient number, since it is larger than the sum of its proper divisors (314192).

628378 is a wasteful number, since it uses less digits than its factorization.

628378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314191.

The product of its digits is 16128, while the sum is 34.

The square root of 628378 is about 792.7029708535. The cubic root of 628378 is about 85.6525552886.

The spelling of 628378 in words is "six hundred twenty-eight thousand, three hundred seventy-eight".