191932812 has 18 divisors (see below), whose sum is σ = 485163588. Its totient is φ = 63977592.

The previous prime is 191932799. The next prime is 191932843. The reversal of 191932812 is 218239191.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5331467 = 191932812 / (1 + 9 + 1 + 9 + 3 + 2 + 8 + 1 + 2).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2665698 + ... + 2665769.

Almost surely, 2^191932812 is an apocalyptic number.

191932812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191932812 is an abundant number, since it is smaller than the sum of its proper divisors (293230776).

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

191932812 is a wasteful number, since it uses less digits than its factorization.

191932812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331477 (or 5331472 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 191932812 is about 13853.9818102956. The cubic root of 191932812 is about 576.8325273108.

The spelling of 191932812 in words is "one hundred ninety-one million, nine hundred thirty-two thousand, eight hundred twelve".