405722 has 8 divisors (see below), whose sum is σ = 644436. Its totient is φ = 190912.

The previous prime is 405719. The next prime is 405731. The reversal of 405722 is 227504.

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 44521 = 601^2 + 211^2 .

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

It is a super-2 number, since 2×405722² = 329220682568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405694 and 405703.

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, 5933 + ... + 6000.

2⁴⁰⁵⁷²² is an apocalyptic number.

405722 is a deficient number, since it is larger than the sum of its proper divisors (238714).

405722 is a wasteful number, since it uses less digits than its factorization.

405722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11952.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 405722 is about 636.9631072519. The cubic root of 405722 is about 74.0303016882.

The spelling of 405722 in words is "four hundred five thousand, seven hundred twenty-two".