191190402 has 32 divisors (see below), whose sum is σ = 457551360. Its totient is φ = 58827600.

The previous prime is 191190401. The next prime is 191190403. The reversal of 191190402 is 204091191.

191190402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (191190401) and next prime (191190403).

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

It is not an unprimeable number, because it can be changed into a prime (191190401) 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 15 ways as a sum of consecutive naturals, for example, 135474 + ... + 136877.

It is an arithmetic number, because the mean of its divisors is an integer number (14298480).

Almost surely, 2^191190402 is an apocalyptic number.

191190402 is an abundant number, since it is smaller than the sum of its proper divisors (266360958).

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

191190402 is a wasteful number, since it uses less digits than its factorization.

191190402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272375 (or 272369 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 191190402 is about 13827.1617478064. The cubic root of 191190402 is about 576.0878229804.

The spelling of 191190402 in words is "one hundred ninety-one million, one hundred ninety thousand, four hundred two".