648933186 has 16 divisors (see below), whose sum is σ = 1415854368. Its totient is φ = 196646400.

The previous prime is 648933161. The next prime is 648933191. The reversal of 648933186 is 681339846.

It is a super-2 number, since 2×648933186² = 842228559784221192, which contains 22 as substring.

It is a Curzon 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, 4916095 + ... + 4916226.

It is an arithmetic number, because the mean of its divisors is an integer number (88490898).

Almost surely, 2^648933186 is an apocalyptic number.

648933186 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

648933186 is an abundant number, since it is smaller than the sum of its proper divisors (766921182).

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

648933186 is a wasteful number, since it uses less digits than its factorization.

648933186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9832337.

The product of its digits is 746496, while the sum is 48.

The square root of 648933186 is about 25474.1670325057. The cubic root of 648933186 is about 865.7649401944.

The spelling of 648933186 in words is "six hundred forty-eight million, nine hundred thirty-three thousand, one hundred eighty-six".