647143276 has 36 divisors (see below), whose sum is σ = 1232253568. Its totient is φ = 295617888.

The previous prime is 647143241. The next prime is 647143279. The reversal of 647143276 is 672341746.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (647143279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594805 + ... + 595891.

Almost surely, 2^647143276 is an apocalyptic number.

It is an amenable number.

647143276 is a deficient number, since it is larger than the sum of its proper divisors (585110292).

647143276 is a wasteful number, since it uses less digits than its factorization.

647143276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 1209 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 647143276 is about 25439.0109084453. The cubic root of 647143276 is about 864.9682129386.

The spelling of 647143276 in words is "six hundred forty-seven million, one hundred forty-three thousand, two hundred seventy-six".