405956 has 6 divisors (see below), whose sum is σ = 710430. Its totient is φ = 202976.

The previous prime is 405949. The next prime is 405959. The reversal of 405956 is 659504.

It can be written as a sum of positive squares in only one way, i.e., 372100 + 33856 = 610^2 + 184^2 .

It is not an unprimeable number, because it can be changed into a prime (405959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50741 + ... + 50748.

It is an arithmetic number, because the mean of its divisors is an integer number (118405).

2⁴⁰⁵⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

405956 is a deficient number, since it is larger than the sum of its proper divisors (304474).

405956 is a wasteful number, since it uses less digits than its factorization.

405956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101493 (or 101491 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 405956 is about 637.1467648823. The cubic root of 405956 is about 74.0445312685.

The spelling of 405956 in words is "four hundred five thousand, nine hundred fifty-six".