191933428 has 6 divisors (see below), whose sum is σ = 335883506. Its totient is φ = 95966712.

The previous prime is 191933363. The next prime is 191933429. The reversal of 191933428 is 824339191.

It can be written as a sum of positive squares in only one way, i.e., 190771344 + 1162084 = 13812^2 + 1078^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191933429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23991675 + ... + 23991682.

Almost surely, 2^191933428 is an apocalyptic number.

It is an amenable number.

191933428 is a deficient number, since it is larger than the sum of its proper divisors (143950078).

191933428 is a wasteful number, since it uses less digits than its factorization.

191933428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47983361 (or 47983359 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 191933428 is about 13854.0040421533. The cubic root of 191933428 is about 576.8331444164.

The spelling of 191933428 in words is "one hundred ninety-one million, nine hundred thirty-three thousand, four hundred twenty-eight".