406920838 has 4 divisors (see below), whose sum is σ = 610381260. Its totient is φ = 203460418.

The previous prime is 406920799. The next prime is 406920847. The reversal of 406920838 is 838029604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 406920838.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 101730208 + ... + 101730211.

It is an arithmetic number, because the mean of its divisors is an integer number (152595315).

Almost surely, 2^406920838 is an apocalyptic number.

406920838 is a deficient number, since it is larger than the sum of its proper divisors (203460422).

406920838 is a wasteful number, since it uses less digits than its factorization.

406920838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203460421.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 406920838 is about 20172.2789490925. The cubic root of 406920838 is about 741.0314554686.

The spelling of 406920838 in words is "four hundred six million, nine hundred twenty thousand, eight hundred thirty-eight".