647123382 has 12 divisors (see below), whose sum is σ = 1402100700. Its totient is φ = 215707788.

The previous prime is 647123381. The next prime is 647123437. The reversal of 647123382 is 283321746.

It is a happy number.

647123382 is a `hidden beast` number, since 647 + 1 + 2 + 3 + 3 + 8 + 2 = 666.

It is a super-2 number, since 2×647123382² = 837537343062235848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647123381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17975632 + ... + 17975667.

It is an arithmetic number, because the mean of its divisors is an integer number (116841725).

Almost surely, 2^647123382 is an apocalyptic number.

647123382 is an abundant number, since it is smaller than the sum of its proper divisors (754977318).

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

647123382 is a wasteful number, since it uses less digits than its factorization.

647123382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35951307 (or 35951304 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 647123382 is about 25438.6198918102. The cubic root of 647123382 is about 864.9593494434.

The spelling of 647123382 in words is "six hundred forty-seven million, one hundred twenty-three thousand, three hundred eighty-two".