647261356 has 12 divisors (see below), whose sum is σ = 1294522768. Its totient is φ = 277397712.

The previous prime is 647261317. The next prime is 647261359. The reversal of 647261356 is 653162746.

647261356 is an admirable number.

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

It is not an unprimeable number, because it can be changed into a prime (647261359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11558211 + ... + 11558266.

Almost surely, 2^647261356 is an apocalyptic number.

It is an amenable number.

647261356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

647261356 is a wasteful number, since it uses less digits than its factorization.

647261356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23116488 (or 23116486 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 647261356 is about 25441.3316475376. The cubic root of 647261356 is about 865.0208181030.

The spelling of 647261356 in words is "six hundred forty-seven million, two hundred sixty-one thousand, three hundred fifty-six".