647049312 has 216 divisors, whose sum is σ = 2305766736. Its totient is φ = 170601984.

The previous prime is 647049311. The next prime is 647049343. The reversal of 647049312 is 213940746.

647049312 is a `hidden beast` number, since 647 + 0 + 4 + 9 + 3 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647049311) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181693 + ... + 185219.

It is an arithmetic number, because the mean of its divisors is an integer number (10674846).

Almost surely, 2^647049312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647049312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152883368).

647049312 is an abundant number, since it is smaller than the sum of its proper divisors (1658717424).

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

647049312 is a wasteful number, since it uses less digits than its factorization.

647049312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570 (or 3552 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 647049312 is about 25437.1639928668. The cubic root of 647049312 is about 864.9263469870.

The spelling of 647049312 in words is "six hundred forty-seven million, forty-nine thousand, three hundred twelve".