406856039 has 4 divisors (see below), whose sum is σ = 424545456. Its totient is φ = 389166624.

The previous prime is 406856029. The next prime is 406856071. The reversal of 406856039 is 930658604.

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

It is not a de Polignac number, because 406856039 - 2⁸ = 406855783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406855987 and 406856005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406856029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8844674 + ... + 8844719.

It is an arithmetic number, because the mean of its divisors is an integer number (106136364).

Almost surely, 2^406856039 is an apocalyptic number.

406856039 is a deficient number, since it is larger than the sum of its proper divisors (17689417).

406856039 is a wasteful number, since it uses less digits than its factorization.

406856039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17689416.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 406856039 is about 20170.6727453499. The cubic root of 406856039 is about 740.9921188689.

The spelling of 406856039 in words is "four hundred six million, eight hundred fifty-six thousand, thirty-nine".