647455470 has 16 divisors (see below), whose sum is σ = 1553893200. Its totient is φ = 172654784.

The previous prime is 647455463. The next prime is 647455499. The reversal of 647455470 is 74554746.

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 7 ways as a sum of consecutive naturals, for example, 10790895 + ... + 10790954.

It is an arithmetic number, because the mean of its divisors is an integer number (97118325).

Almost surely, 2^647455470 is an apocalyptic number.

647455470 is an abundant number, since it is smaller than the sum of its proper divisors (906437730).

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

647455470 is a wasteful number, since it uses less digits than its factorization.

647455470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21581859.

The product of its (nonzero) digits is 470400, while the sum is 42.

The square root of 647455470 is about 25445.1462955118. The cubic root of 647455470 is about 865.1072828500.

The spelling of 647455470 in words is "six hundred forty-seven million, four hundred fifty-five thousand, four hundred seventy".