191213680 has 60 divisors (see below), whose sum is σ = 517165560. Its totient is φ = 65557632.

The previous prime is 191213653. The next prime is 191213683. The reversal of 191213680 is 86312191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191213683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20470 + ... + 28309.

It is an arithmetic number, because the mean of its divisors is an integer number (8619426).

Almost surely, 2^191213680 is an apocalyptic number.

191213680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191213680 is an abundant number, since it is smaller than the sum of its proper divisors (325951880).

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

191213680 is a wasteful number, since it uses less digits than its factorization.

191213680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48806 (or 48793 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 191213680 is about 13828.0034712174. The cubic root of 191213680 is about 576.1112021668. Note that the first 3 decimals are identical.

It can be divided in two parts, 19121 and 3680, that added together give a square (22801 = 151²).

The spelling of 191213680 in words is "one hundred ninety-one million, two hundred thirteen thousand, six hundred eighty".