191540080 has 40 divisors (see below), whose sum is σ = 449939952. Its totient is φ = 75823104.

The previous prime is 191540077. The next prime is 191540093. The reversal of 191540080 is 80045191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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, 4582 + ... + 20101.

Almost surely, 2^191540080 is an apocalyptic number.

191540080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191540080 is an abundant number, since it is smaller than the sum of its proper divisors (258399872).

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

191540080 is a wasteful number, since it uses less digits than its factorization.

191540080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24793 (or 24787 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 191540080 is about 13839.8005765979. The cubic root of 191540080 is about 576.4388213379.

The spelling of 191540080 in words is "one hundred ninety-one million, five hundred forty thousand, eighty".