223436640 has 96 divisors (see below), whose sum is σ = 804384000. Its totient is φ = 51070464.

The previous prime is 223436639. The next prime is 223436669. The reversal of 223436640 is 46634322.

It is a happy number.

223436640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (30).

It is a junction number, because it is equal to n+sod(n) for n = 223436598 and 223436607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29890 + ... + 36609.

It is an arithmetic number, because the mean of its divisors is an integer number (8379000).

Almost surely, 2^223436640 is an apocalyptic number.

223436640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223436640 is an abundant number, since it is smaller than the sum of its proper divisors (580947360).

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

223436640 is a wasteful number, since it uses less digits than its factorization.

223436640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66524 (or 66516 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 223436640 is about 14947.7971621239. The cubic root of 223436640 is about 606.8082322022.

The spelling of 223436640 in words is "two hundred twenty-three million, four hundred thirty-six thousand, six hundred forty".