628547538 has 16 divisors (see below), whose sum is σ = 1277703936. Its totient is φ = 206081040.

The previous prime is 628547503. The next prime is 628547561. The reversal of 628547538 is 835745826.

It is a super-2 number, since 2×628547538² = 790144015051722888, which contains 22 as substring.

It is an unprimeable number.

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, 858306 + ... + 859037.

It is an arithmetic number, because the mean of its divisors is an integer number (79856496).

Almost surely, 2^628547538 is an apocalyptic number.

628547538 is an abundant number, since it is smaller than the sum of its proper divisors (649156398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628547538 is a wasteful number, since it uses less digits than its factorization.

628547538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717409.

The product of its digits is 1612800, while the sum is 48.

The square root of 628547538 is about 25070.8503645170. The cubic root of 628547538 is about 856.6025768914.

The spelling of 628547538 in words is "six hundred twenty-eight million, five hundred forty-seven thousand, five hundred thirty-eight".