224681388 has 24 divisors (see below), whose sum is σ = 547051008. Its totient is φ = 71637456.

The previous prime is 224681339. The next prime is 224681389. The reversal of 224681388 is 883186422.

It is a happy number.

It is a super-2 number, since 2×224681388² = 100963452227213088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (224681389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406756 + ... + 407307.

It is an arithmetic number, because the mean of its divisors is an integer number (22793792).

Almost surely, 2^224681388 is an apocalyptic number.

It is an amenable number.

224681388 is an abundant number, since it is smaller than the sum of its proper divisors (322369620).

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

224681388 is a wasteful number, since it uses less digits than its factorization.

224681388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814093 (or 814091 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 224681388 is about 14989.3758375724. The cubic root of 224681388 is about 607.9329731917.

The spelling of 224681388 in words is "two hundred twenty-four million, six hundred eighty-one thousand, three hundred eighty-eight".