649228 has 12 divisors (see below), whose sum is σ = 1148112. Its totient is φ = 321200.

The previous prime is 649217. The next prime is 649261. The reversal of 649228 is 822946.

It is a super-4 number, since 4×649228⁴ (a number of 24 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (95676).

2⁶⁴⁹²²⁸ is an apocalyptic number.

It is an amenable number.

649228 is a deficient number, since it is larger than the sum of its proper divisors (498884).

649228 is a wasteful number, since it uses less digits than its factorization.

649228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712 (or 1710 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 649228 is about 805.7468585108. The cubic root of 649228 is about 86.5896027641.

The spelling of 649228 in words is "six hundred forty-nine thousand, two hundred twenty-eight".