191039030 has 128 divisors (see below), whose sum is σ = 458535168. Its totient is φ = 55590912.

The previous prime is 191039027. The next prime is 191039059. The reversal of 191039030 is 30930191.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 819794 + ... + 820026.

It is an arithmetic number, because the mean of its divisors is an integer number (3582306).

Almost surely, 2^191039030 is an apocalyptic number.

191039030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191039030 is an abundant number, since it is smaller than the sum of its proper divisors (267496138).

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

191039030 is a wasteful number, since it uses less digits than its factorization.

191039030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 191039030 is about 13821.6869447980. The cubic root of 191039030 is about 575.9357466747.

The spelling of 191039030 in words is "one hundred ninety-one million, thirty-nine thousand, thirty".