647986196 has 48 divisors (see below), whose sum is σ = 1334760000. Its totient is φ = 271365120.

The previous prime is 647986193. The next prime is 647986243. The reversal of 647986196 is 691689746.

It is a super-2 number, since 2×647986196² = 839772220413100832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647986193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518180 + ... + 519428.

It is an arithmetic number, because the mean of its divisors is an integer number (27807500).

Almost surely, 2^647986196 is an apocalyptic number.

It is an amenable number.

647986196 is an abundant number, since it is smaller than the sum of its proper divisors (686773804).

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

647986196 is a wasteful number, since it uses less digits than its factorization.

647986196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2182 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 647986196 is about 25455.5729851049. The cubic root of 647986196 is about 865.3435974454.

The spelling of 647986196 in words is "six hundred forty-seven million, nine hundred eighty-six thousand, one hundred ninety-six".