224213840 has 20 divisors (see below), whose sum is σ = 521297364. Its totient is φ = 89685504.

The previous prime is 224213831. The next prime is 224213849. The reversal of 224213840 is 48312422.

It is an interprime number because it is at equal distance from previous prime (224213831) and next prime (224213849).

It can be written as a sum of positive squares in 2 ways, for example, as 163123984 + 61089856 = 12772^2 + 7816^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224213849) 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, 1401257 + ... + 1401416.

Almost surely, 2^224213840 is an apocalyptic number.

224213840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224213840 is an abundant number, since it is smaller than the sum of its proper divisors (297083524).

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

224213840 is a wasteful number, since it uses less digits than its factorization.

224213840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802686 (or 2802680 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 224213840 is about 14973.7717359388. The cubic root of 224213840 is about 607.5109901087.

The spelling of 224213840 in words is "two hundred twenty-four million, two hundred thirteen thousand, eight hundred forty".