647543228 has 12 divisors (see below), whose sum is σ = 1133691720. Its totient is φ = 323631312.

The previous prime is 647543213. The next prime is 647543249. The reversal of 647543228 is 822345746.

It is a super-3 number, since 3×647543228³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

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, 24326 + ... + 43437.

It is an arithmetic number, because the mean of its divisors is an integer number (94474310).

Almost surely, 2^647543228 is an apocalyptic number.

It is an amenable number.

647543228 is a deficient number, since it is larger than the sum of its proper divisors (486148492).

647543228 is a wasteful number, since it uses less digits than its factorization.

647543228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70156 (or 70154 counting only the distinct ones).

The product of its digits is 322560, while the sum is 41.

The square root of 647543228 is about 25446.8706916980. The cubic root of 647543228 is about 865.1463674710.

The spelling of 647543228 in words is "six hundred forty-seven million, five hundred forty-three thousand, two hundred twenty-eight".