647862 has 16 divisors (see below), whose sum is σ = 1364160. Its totient is φ = 204552.

The previous prime is 647861. The next prime is 647891. The reversal of 647862 is 268746.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647862.

It is not an unprimeable number, because it can be changed into a prime (647861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (85260).

2⁶⁴⁷⁸⁶² is an apocalyptic number.

647862 is an abundant number, since it is smaller than the sum of its proper divisors (716298).

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

647862 is a wasteful number, since it uses less digits than its factorization.

647862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707.

The product of its digits is 16128, while the sum is 33.

The square root of 647862 is about 804.8987513967. The cubic root of 647862 is about 86.5288308675.

The spelling of 647862 in words is "six hundred forty-seven thousand, eight hundred sixty-two".