648933228 has 48 divisors (see below), whose sum is σ = 1684892160. Its totient is φ = 215993232.

The previous prime is 648933209. The next prime is 648933283. The reversal of 648933228 is 822339846.

It is a super-2 number, since 2×648933228² = 842228668804999968, 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 15 ways as a sum of consecutive naturals, for example, 76201 + ... + 84287.

It is an arithmetic number, because the mean of its divisors is an integer number (35101920).

Almost surely, 2^648933228 is an apocalyptic number.

It is an amenable number.

648933228 is an abundant number, since it is smaller than the sum of its proper divisors (1035958932).

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

648933228 is a wasteful number, since it uses less digits than its factorization.

648933228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 8835 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 648933228 is about 25474.1678568702. The cubic root of 648933228 is about 865.7649588723.

It can be divided in two parts, 64893 and 3228, that added together give a square (68121 = 261²).

The spelling of 648933228 in words is "six hundred forty-eight million, nine hundred thirty-three thousand, two hundred twenty-eight".