191302128 has 40 divisors (see below), whose sum is σ = 549109200. Its totient is φ = 63767232.

The previous prime is 191302123. The next prime is 191302211. The reversal of 191302128 is 821203191.

191302128 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191302123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220983 + ... + 221846.

It is an arithmetic number, because the mean of its divisors is an integer number (13727730).

Almost surely, 2^191302128 is an apocalyptic number.

191302128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

191302128 is an abundant number, since it is smaller than the sum of its proper divisors (357807072).

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

191302128 is a wasteful number, since it uses less digits than its factorization.

191302128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442846 (or 442834 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 191302128 is about 13831.2012493492. The cubic root of 191302128 is about 576.2000173410.

The spelling of 191302128 in words is "one hundred ninety-one million, three hundred two thousand, one hundred twenty-eight".