223991424 has 96 divisors (see below), whose sum is σ = 650058240. Its totient is φ = 74027520.

The previous prime is 223991419. The next prime is 223991459. The reversal of 223991424 is 424199322.

223991424 is a `hidden beast` number, since 223 + 9 + 9 + 1 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145539 + ... + 147069.

It is an arithmetic number, because the mean of its divisors is an integer number (6771440).

Almost surely, 2^223991424 is an apocalyptic number.

223991424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223991424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325029120).

223991424 is an abundant number, since it is smaller than the sum of its proper divisors (426066816).

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

223991424 is a wasteful number, since it uses less digits than its factorization.

223991424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1663 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 223991424 is about 14966.3430403021. The cubic root of 223991424 is about 607.3100437444.

The spelling of 223991424 in words is "two hundred twenty-three million, nine hundred ninety-one thousand, four hundred twenty-four".