223781404 has 96 divisors (see below), whose sum is σ = 524482560. Its totient is φ = 80870400.

The previous prime is 223781399. The next prime is 223781413. The reversal of 223781404 is 404187322.

It is a super-2 number, since 2×223781404² = 100156233552422432, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 413374 + ... + 413914.

It is an arithmetic number, because the mean of its divisors is an integer number (5463360).

Almost surely, 2^223781404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223781404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262241280).

223781404 is an abundant number, since it is smaller than the sum of its proper divisors (300701156).

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

223781404 is a wasteful number, since it uses less digits than its factorization.

223781404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 223781404 is about 14959.3249847712. The cubic root of 223781404 is about 607.1201746596.

The spelling of 223781404 in words is "two hundred twenty-three million, seven hundred eighty-one thousand, four hundred four".