628454 has 4 divisors (see below), whose sum is σ = 942684. Its totient is φ = 314226.

The previous prime is 628447. The next prime is 628477. The reversal of 628454 is 454826.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157112 + ... + 157115.

It is an arithmetic number, because the mean of its divisors is an integer number (235671).

2⁶²⁸⁴⁵⁴ is an apocalyptic number.

628454 is a deficient number, since it is larger than the sum of its proper divisors (314230).

628454 is a wasteful number, since it uses less digits than its factorization.

628454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314229.

The product of its digits is 7680, while the sum is 29.

The square root of 628454 is about 792.7509066535. The cubic root of 628454 is about 85.6560082695.

The spelling of 628454 in words is "six hundred twenty-eight thousand, four hundred fifty-four".