628581324 has 48 divisors (see below), whose sum is σ = 1774821888. Its totient is φ = 169029888.

The previous prime is 628581323. The next prime is 628581347. The reversal of 628581324 is 423185826.

It is a super-2 number, since 2×628581324² = 790228961763185952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628581323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218664 + ... + 221519.

It is an arithmetic number, because the mean of its divisors is an integer number (36975456).

Almost surely, 2^628581324 is an apocalyptic number.

It is an amenable number.

628581324 is an abundant number, since it is smaller than the sum of its proper divisors (1146240564).

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

628581324 is a wasteful number, since it uses less digits than its factorization.

628581324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440214 (or 440212 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 628581324 is about 25071.5241658739. The cubic root of 628581324 is about 856.6179247923.

The spelling of 628581324 in words is "six hundred twenty-eight million, five hundred eighty-one thousand, three hundred twenty-four".