195640406 has 8 divisors (see below), whose sum is σ = 316034544. Its totient is φ = 90295560.

The previous prime is 195640373. The next prime is 195640421. The reversal of 195640406 is 604046591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3762290 + ... + 3762341.

It is an arithmetic number, because the mean of its divisors is an integer number (39504318).

Almost surely, 2^195640406 is an apocalyptic number.

195640406 is a deficient number, since it is larger than the sum of its proper divisors (120394138).

195640406 is a wasteful number, since it uses less digits than its factorization.

195640406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524646.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 195640406 is about 13987.1514612519. The cubic root of 195640406 is about 580.5231170267.

Adding to 195640406 its reverse (604046591), we get a palindrome (799686997).

The spelling of 195640406 in words is "one hundred ninety-five million, six hundred forty thousand, four hundred six".