647673420 has 24 divisors (see below), whose sum is σ = 1813485744. Its totient is φ = 172712896.

The previous prime is 647673401. The next prime is 647673437. The reversal of 647673420 is 24376746.

647673420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5397219 + ... + 5397338.

It is an arithmetic number, because the mean of its divisors is an integer number (75561906).

Almost surely, 2^647673420 is an apocalyptic number.

647673420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

647673420 is an abundant number, since it is smaller than the sum of its proper divisors (1165812324).

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

647673420 is a wasteful number, since it uses less digits than its factorization.

647673420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10794569 (or 10794567 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 39.

The square root of 647673420 is about 25449.4286772808. The cubic root of 647673420 is about 865.2043443407.

The spelling of 647673420 in words is "six hundred forty-seven million, six hundred seventy-three thousand, four hundred twenty".