647885142 has 48 divisors (see below), whose sum is σ = 1532381760. Its totient is φ = 204592392.

The previous prime is 647885111. The next prime is 647885219. The reversal of 647885142 is 241588746.

647885142 is a `hidden beast` number, since 64 + 78 + 8 + 514 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 25848 + ... + 44315.

It is an arithmetic number, because the mean of its divisors is an integer number (31924620).

Almost surely, 2^647885142 is an apocalyptic number.

647885142 is an abundant number, since it is smaller than the sum of its proper divisors (884496618).

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

647885142 is a wasteful number, since it uses less digits than its factorization.

647885142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70199 (or 70187 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 647885142 is about 25453.5879985514. The cubic root of 647885142 is about 865.2986114161.

The spelling of 647885142 in words is "six hundred forty-seven million, eight hundred eighty-five thousand, one hundred forty-two".