191389072 has 40 divisors (see below), whose sum is σ = 442221696. Its totient is φ = 78456576.

The previous prime is 191389069. The next prime is 191389073. The reversal of 191389072 is 270983191.

It is not an unprimeable number, because it can be changed into a prime (191389073) 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 7 ways as a sum of consecutive naturals, for example, 34573 + ... + 39724.

Almost surely, 2^191389072 is an apocalyptic number.

It is an amenable number.

191389072 is an abundant number, since it is smaller than the sum of its proper divisors (250832624).

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

191389072 is a wasteful number, since it uses less digits than its factorization.

191389072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74335 (or 74329 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 191389072 is about 13834.3439309568. The cubic root of 191389072 is about 576.2872955943.

The spelling of 191389072 in words is "one hundred ninety-one million, three hundred eighty-nine thousand, seventy-two".