224640405 has 32 divisors (see below), whose sum is σ = 435669120. Its totient is φ = 108915840.

The previous prime is 224640349. The next prime is 224640421. The reversal of 224640405 is 504046422.

It is not a de Polignac number, because 224640405 - 2⁷ = 224640277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74152 + ... + 77121.

It is an arithmetic number, because the mean of its divisors is an integer number (13614660).

Almost surely, 2^224640405 is an apocalyptic number.

It is an amenable number.

224640405 is a deficient number, since it is larger than the sum of its proper divisors (211028715).

224640405 is a wasteful number, since it uses less digits than its factorization.

224640405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151298 (or 151292 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 224640405 is about 14988.0087069630. The cubic root of 224640405 is about 607.8960076138.

Adding to 224640405 its reverse (504046422), we get a palindrome (728686827).

The spelling of 224640405 in words is "two hundred twenty-four million, six hundred forty thousand, four hundred five".