223772720 has 20 divisors (see below), whose sum is σ = 520271760. Its totient is φ = 89509056.

The previous prime is 223772719. The next prime is 223772723. The reversal of 223772720 is 27277322.

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

It is not an unprimeable number, because it can be changed into a prime (223772723) 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, 1398500 + ... + 1398659.

It is an arithmetic number, because the mean of its divisors is an integer number (26013588).

Almost surely, 2^223772720 is an apocalyptic number.

223772720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223772720 is an abundant number, since it is smaller than the sum of its proper divisors (296499040).

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

223772720 is a wasteful number, since it uses less digits than its factorization.

223772720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797172 (or 2797166 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 223772720 is about 14959.0347282169. The cubic root of 223772720 is about 607.1123213115.

The spelling of 223772720 in words is "two hundred twenty-three million, seven hundred seventy-two thousand, seven hundred twenty".