647850 has 48 divisors (see below), whose sum is σ = 1839168. Its totient is φ = 147840.

The previous prime is 647839. The next prime is 647851. The reversal of 647850 is 58746.

It is a happy number.

647850 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (647851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 742 + ... + 1358.

It is an arithmetic number, because the mean of its divisors is an integer number (38316).

2⁶⁴⁷⁸⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919584).

647850 is an abundant number, since it is smaller than the sum of its proper divisors (1191318).

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

647850 is a wasteful number, since it uses less digits than its factorization.

647850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 647850 is about 804.8912970085. The cubic root of 647850 is about 86.5282966218.

The spelling of 647850 in words is "six hundred forty-seven thousand, eight hundred fifty".