405774 has 12 divisors (see below), whose sum is σ = 879216. Its totient is φ = 135252.

The previous prime is 405767. The next prime is 405781. The reversal of 405774 is 477504.

405774 = 317² + 318² + ... + 320².

It is an interprime number because it is at equal distance from previous prime (405767) and next prime (405781).

It is a congruent number.

It is an unprimeable number.

405774 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 in 5 ways as a sum of consecutive naturals, for example, 11254 + ... + 11289.

It is an arithmetic number, because the mean of its divisors is an integer number (73268).

2⁴⁰⁵⁷⁷⁴ is an apocalyptic number.

405774 is an abundant number, since it is smaller than the sum of its proper divisors (473442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405774 is a wasteful number, since it uses less digits than its factorization.

405774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551 (or 22548 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 405774 is about 637.0039246347. The cubic root of 405774 is about 74.0334642899.

The spelling of 405774 in words is "four hundred five thousand, seven hundred seventy-four".