191400006 has 16 divisors (see below), whose sum is σ = 437485824. Its totient is φ = 54685704.

The previous prime is 191399993. The next prime is 191400007. The reversal of 191400006 is 600004191.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191400007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2278530 + ... + 2278613.

It is an arithmetic number, because the mean of its divisors is an integer number (27342864).

Almost surely, 2^191400006 is an apocalyptic number.

191400006 is an abundant number, since it is smaller than the sum of its proper divisors (246085818).

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

191400006 is a wasteful number, since it uses less digits than its factorization.

191400006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557155.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 191400006 is about 13834.7391012624. The cubic root of 191400006 is about 576.2982697585.

Adding to 191400006 its reverse (600004191), we get a palindrome (791404197).

The spelling of 191400006 in words is "one hundred ninety-one million, four hundred thousand, six".