223779720 has 128 divisors (see below), whose sum is σ = 718704000. Its totient is φ = 55572480.

The previous prime is 223779707. The next prime is 223779749. The reversal of 223779720 is 27977322.

223779720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138276 + ... + 139884.

It is an arithmetic number, because the mean of its divisors is an integer number (5614875).

Almost surely, 2^223779720 is an apocalyptic number.

223779720 is a gapful number since it is divisible by the number (20) 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 223779720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359352000).

223779720 is an abundant number, since it is smaller than the sum of its proper divisors (494924280).

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

223779720 is a wasteful number, since it uses less digits than its factorization.

223779720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703 (or 1699 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 39.

The square root of 223779720 is about 14959.2686987032. The cubic root of 223779720 is about 607.1186517554.

The spelling of 223779720 in words is "two hundred twenty-three million, seven hundred seventy-nine thousand, seven hundred twenty".