191402238 has 32 divisors (see below), whose sum is σ = 404812800. Its totient is φ = 60163776.

The previous prime is 191402231. The next prime is 191402279. The reversal of 191402238 is 832204191.

It is a super-2 number, since 2×191402238² = 73269633422817288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191402231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21658 + ... + 29186.

It is an arithmetic number, because the mean of its divisors is an integer number (12650400).

Almost surely, 2^191402238 is an apocalyptic number.

191402238 is an abundant number, since it is smaller than the sum of its proper divisors (213410562).

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

191402238 is a wasteful number, since it uses less digits than its factorization.

191402238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7776.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 191402238 is about 13834.8197675286. The cubic root of 191402238 is about 576.3005099060.

The spelling of 191402238 in words is "one hundred ninety-one million, four hundred two thousand, two hundred thirty-eight".