405544 has 16 divisors (see below), whose sum is σ = 767520. Its totient is φ = 200880.

The previous prime is 405541. The next prime is 405553. The reversal of 405544 is 445504.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (405541) 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, 1149 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (47970).

2⁴⁰⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

405544 is a deficient number, since it is larger than the sum of its proper divisors (361976).

405544 is a wasteful number, since it uses less digits than its factorization.

405544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 405544 is about 636.8233664055. The cubic root of 405544 is about 74.0194738132.

It can be divided in two parts, 405 and 544, that added together give a palindrome (949).

The spelling of 405544 in words is "four hundred five thousand, five hundred forty-four".