628534 has 4 divisors (see below), whose sum is σ = 942804. Its totient is φ = 314266.

The previous prime is 628499. The next prime is 628547. The reversal of 628534 is 435826.

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, 157132 + ... + 157135.

It is an arithmetic number, because the mean of its divisors is an integer number (235701).

2⁶²⁸⁵³⁴ is an apocalyptic number.

628534 is a deficient number, since it is larger than the sum of its proper divisors (314270).

628534 is a wasteful number, since it uses less digits than its factorization.

628534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314269.

The product of its digits is 5760, while the sum is 28.

The square root of 628534 is about 792.8013622592. The cubic root of 628534 is about 85.6596426856.

The spelling of 628534 in words is "six hundred twenty-eight thousand, five hundred thirty-four".