646000822 has 4 divisors (see below), whose sum is σ = 969001236. Its totient is φ = 323000410.

The previous prime is 646000819. The next prime is 646000843. The reversal of 646000822 is 228000646.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161500204 + ... + 161500207.

It is an arithmetic number, because the mean of its divisors is an integer number (242250309).

Almost surely, 2^646000822 is an apocalyptic number.

646000822 is a deficient number, since it is larger than the sum of its proper divisors (323000414).

646000822 is a wasteful number, since it uses less digits than its factorization.

646000822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323000413.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 646000822 is about 25416.5462248512. The cubic root of 646000822 is about 864.4589138335.

The spelling of 646000822 in words is "six hundred forty-six million, eight hundred twenty-two", and thus it is an aban number.