647427156 has 12 divisors (see below), whose sum is σ = 1510663392. Its totient is φ = 215809048.

The previous prime is 647427127. The next prime is 647427163. The reversal of 647427156 is 651724746.

647427156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 26976120 + ... + 26976143.

It is an arithmetic number, because the mean of its divisors is an integer number (125888616).

Almost surely, 2^647427156 is an apocalyptic number.

It is an amenable number.

647427156 is an abundant number, since it is smaller than the sum of its proper divisors (863236236).

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

647427156 is a wasteful number, since it uses less digits than its factorization.

647427156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53952270 (or 53952268 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 647427156 is about 25444.5899161295. The cubic root of 647427156 is about 865.0946719417.

The spelling of 647427156 in words is "six hundred forty-seven million, four hundred twenty-seven thousand, one hundred fifty-six".