647855754 has 192 divisors, whose sum is σ = 1758153600. Its totient is φ = 158086656.

The previous prime is 647855731. The next prime is 647855773. The reversal of 647855754 is 457558746.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 647855697 and 647855706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10980577 + ... + 10980635.

It is an arithmetic number, because the mean of its divisors is an integer number (9157050).

Almost surely, 2^647855754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647855754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (879076800).

647855754 is an abundant number, since it is smaller than the sum of its proper divisors (1110297846).

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

647855754 is a wasteful number, since it uses less digits than its factorization.

647855754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 101 counting only the distinct ones).

The product of its digits is 4704000, while the sum is 51.

The square root of 647855754 is about 25453.0107060049. The cubic root of 647855754 is about 865.2855279344.

The spelling of 647855754 in words is "six hundred forty-seven million, eight hundred fifty-five thousand, seven hundred fifty-four".