646008 has 32 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 195680.

The previous prime is 646003. The next prime is 646013. The reversal of 646008 is 800646.

It is an interprime number because it is at equal distance from previous prime (646003) and next prime (646013).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2⁶⁴⁶⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

646008 is an abundant number, since it is smaller than the sum of its proper divisors (1116552).

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

646008 is a wasteful number, since it uses less digits than its factorization.

646008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467 (or 2463 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 646008 is about 803.7462286070. The cubic root of 646008 is about 86.4462115616.

The spelling of 646008 in words is "six hundred forty-six thousand, eight".