647625084 has 12 divisors (see below), whose sum is σ = 1511125224. Its totient is φ = 215875024.

The previous prime is 647625067. The next prime is 647625091. The reversal of 647625084 is 480526746.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26984367 + ... + 26984390.

It is an arithmetic number, because the mean of its divisors is an integer number (125927102).

Almost surely, 2^647625084 is an apocalyptic number.

It is an amenable number.

647625084 is an abundant number, since it is smaller than the sum of its proper divisors (863500140).

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

647625084 is a wasteful number, since it uses less digits than its factorization.

647625084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53968764 (or 53968762 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 647625084 is about 25448.4790115244. The cubic root of 647625084 is about 865.1828203461.

The spelling of 647625084 in words is "six hundred forty-seven million, six hundred twenty-five thousand, eighty-four".