647472942 has 12 divisors (see below), whose sum is σ = 1402858080. Its totient is φ = 215824308.

The previous prime is 647472919. The next prime is 647472949. The reversal of 647472942 is 249274746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647472949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17985342 + ... + 17985377.

It is an arithmetic number, because the mean of its divisors is an integer number (116904840).

Almost surely, 2^647472942 is an apocalyptic number.

647472942 is an abundant number, since it is smaller than the sum of its proper divisors (755385138).

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

647472942 is a wasteful number, since it uses less digits than its factorization.

647472942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35970727 (or 35970724 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 647472942 is about 25445.4896199700. The cubic root of 647472942 is about 865.1150646045.

The spelling of 647472942 in words is "six hundred forty-seven million, four hundred seventy-two thousand, nine hundred forty-two".