647686260 has 192 divisors, whose sum is σ = 2184537600. Its totient is φ = 158367744.

The previous prime is 647686219. The next prime is 647686283. The reversal of 647686260 is 62686746.

647686260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1803961 + ... + 1804319.

It is an arithmetic number, because the mean of its divisors is an integer number (11377800).

Almost surely, 2^647686260 is an apocalyptic number.

647686260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647686260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092268800).

647686260 is an abundant number, since it is smaller than the sum of its proper divisors (1536851340).

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

647686260 is a wasteful number, since it uses less digits than its factorization.

647686260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 647686260 is about 25449.6809410256. The cubic root of 647686260 is about 865.2100618058.

The spelling of 647686260 in words is "six hundred forty-seven million, six hundred eighty-six thousand, two hundred sixty".