191681472 has 56 divisors (see below), whose sum is σ = 508195072. Its totient is φ = 63763200.

The previous prime is 191681467. The next prime is 191681489. The reversal of 191681472 is 274186191.

191681472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 191681472.

It is a congruent number.

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, 155097 + ... + 156327.

It is an arithmetic number, because the mean of its divisors is an integer number (9074912).

Almost surely, 2^191681472 is an apocalyptic number.

191681472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191681472 is an abundant number, since it is smaller than the sum of its proper divisors (316513600).

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

191681472 is a wasteful number, since it uses less digits than its factorization.

191681472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2047 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 191681472 is about 13844.9078003431. The cubic root of 191681472 is about 576.5806259341.

The spelling of 191681472 in words is "one hundred ninety-one million, six hundred eighty-one thousand, four hundred seventy-two".