405716 has 6 divisors (see below), whose sum is σ = 710010. Its totient is φ = 202856.

The previous prime is 405709. The next prime is 405719. The reversal of 405716 is 617504.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 21316 = 620^2 + 146^2 .

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 405691 and 405700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405719) by changing a digit.

405716 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50711 + ... + 50718.

It is an arithmetic number, because the mean of its divisors is an integer number (118335).

2⁴⁰⁵⁷¹⁶ is an apocalyptic number.

It is an amenable number.

405716 is a deficient number, since it is larger than the sum of its proper divisors (304294).

405716 is a wasteful number, since it uses less digits than its factorization.

405716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101433 (or 101431 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 405716 is about 636.9583973856. The cubic root of 405716 is about 74.0299367552.

The spelling of 405716 in words is "four hundred five thousand, seven hundred sixteen".