628538858 has 16 divisors (see below), whose sum is σ = 999091584. Its totient is φ = 295538880.

The previous prime is 628538851. The next prime is 628538881. The reversal of 628538858 is 858835826.

It is a super-2 number, since 2×628538858² = 790122192031888328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628538851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38153 + ... + 52083.

It is an arithmetic number, because the mean of its divisors is an integer number (62443224).

Almost surely, 2^628538858 is an apocalyptic number.

628538858 is a deficient number, since it is larger than the sum of its proper divisors (370552726).

628538858 is a wasteful number, since it uses less digits than its factorization.

628538858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15277.

The product of its digits is 3686400, while the sum is 53.

The square root of 628538858 is about 25070.6772545139. The cubic root of 628538858 is about 856.5986337557.

The spelling of 628538858 in words is "six hundred twenty-eight million, five hundred thirty-eight thousand, eight hundred fifty-eight".