223991904 has 48 divisors (see below), whose sum is σ = 590671872. Its totient is φ = 74322048.

The previous prime is 223991891. The next prime is 223991927. The reversal of 223991904 is 409199322.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16177 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (12305664).

Almost surely, 2^223991904 is an apocalyptic number.

223991904 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 223991904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295335936).

223991904 is an abundant number, since it is smaller than the sum of its proper divisors (366679968).

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

223991904 is a wasteful number, since it uses less digits than its factorization.

223991904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699 (or 10691 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 223991904 is about 14966.3590762750. The cubic root of 223991904 is about 607.3104775536.

The spelling of 223991904 in words is "two hundred twenty-three million, nine hundred ninety-one thousand, nine hundred four".