405040224 has 48 divisors (see below), whose sum is σ = 1067432688. Its totient is φ = 134479872.

The previous prime is 405040217. The next prime is 405040241. The reversal of 405040224 is 422040504.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 405040224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16464 + ... + 32880.

It is an arithmetic number, because the mean of its divisors is an integer number (22238181).

Almost surely, 2^405040224 is an apocalyptic number.

It is an amenable number.

405040224 is an abundant number, since it is smaller than the sum of its proper divisors (662392464).

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

405040224 is a wasteful number, since it uses less digits than its factorization.

405040224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16687 (or 16679 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 405040224 is about 20125.6111460000. The cubic root of 405040224 is about 739.8881155412. Note that the first 3 decimals are identical.

Adding to 405040224 its reverse (422040504), we get a palindrome (827080728).

The spelling of 405040224 in words is "four hundred five million, forty thousand, two hundred twenty-four".