224487440 has 20 divisors (see below), whose sum is σ = 521933484. Its totient is φ = 89794944.

The previous prime is 224487437. The next prime is 224487443. The reversal of 224487440 is 44784422.

It is an interprime number because it is at equal distance from previous prime (224487437) and next prime (224487443).

It can be written as a sum of positive squares in 2 ways, for example, as 22733824 + 201753616 = 4768^2 + 14204^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×224487440² = 100789221435507200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 224487440.

It is not an unprimeable number, because it can be changed into a prime (224487443) 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, 1402967 + ... + 1403126.

Almost surely, 2^224487440 is an apocalyptic number.

224487440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224487440 is an abundant number, since it is smaller than the sum of its proper divisors (297446044).

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

224487440 is a wasteful number, since it uses less digits than its factorization.

224487440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806106 (or 2806100 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 35.

The square root of 224487440 is about 14982.9049252807. The cubic root of 224487440 is about 607.7579975250.

The spelling of 224487440 in words is "two hundred twenty-four million, four hundred eighty-seven thousand, four hundred forty".