406136686 has 4 divisors (see below), whose sum is σ = 609205032. Its totient is φ = 203068342.

The previous prime is 406136683. The next prime is 406136701. The reversal of 406136686 is 686631604.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406136683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101534170 + ... + 101534173.

It is an arithmetic number, because the mean of its divisors is an integer number (152301258).

Almost surely, 2^406136686 is an apocalyptic number.

406136686 is a deficient number, since it is larger than the sum of its proper divisors (203068346).

406136686 is a wasteful number, since it uses less digits than its factorization.

406136686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203068345.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 406136686 is about 20152.8332003220. The cubic root of 406136686 is about 740.5551507438. Note that the first 3 decimals are identical.

The spelling of 406136686 in words is "four hundred six million, one hundred thirty-six thousand, six hundred eighty-six".