223993770 has 128 divisors (see below), whose sum is σ = 721889280. Its totient is φ = 42958080.

The previous prime is 223993753. The next prime is 223993771. The reversal of 223993770 is 77399322.

223993770 is nontrivially palindromic in base 12.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (223993771) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26301 + ... + 33759.

It is an arithmetic number, because the mean of its divisors is an integer number (5639760).

Almost surely, 2^223993770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223993770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360944640).

223993770 is an abundant number, since it is smaller than the sum of its proper divisors (497895510).

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

223993770 is a wasteful number, since it uses less digits than its factorization.

223993770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500.

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 223993770 is about 14966.4214159565. The cubic root of 223993770 is about 607.3121639809.

The spelling of 223993770 in words is "two hundred twenty-three million, nine hundred ninety-three thousand, seven hundred seventy".