647496 has 72 divisors (see below), whose sum is σ = 1941030. Its totient is φ = 194304.

The previous prime is 647489. The next prime is 647503. The reversal of 647496 is 694746.

647496 is a `hidden beast` number, since 647 + 4 + 9 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (647489) and next prime (647503).

It can be written as a sum of positive squares in only one way, i.e., 476100 + 171396 = 690^2 + 414^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a self number, because there is not a number n which added to its sum of digits gives 647496.

It is a congruent number.

It is an unprimeable number.

647496 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28141 + ... + 28163.

2⁶⁴⁷⁴⁹⁶ 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 647496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970515).

647496 is an abundant number, since it is smaller than the sum of its proper divisors (1293534).

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

647496 is a wasteful number, since it uses less digits than its factorization.

647496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 45 counting only the distinct ones).

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

The square root of 647496 is about 804.6713614887. The cubic root of 647496 is about 86.5125334061.

The spelling of 647496 in words is "six hundred forty-seven thousand, four hundred ninety-six".