223987780 has 12 divisors (see below), whose sum is σ = 470374380. Its totient is φ = 89595104.

The previous prime is 223987769. The next prime is 223987781. The reversal of 223987780 is 87789322.

It can be written as a sum of positive squares in 2 ways, for example, as 73582084 + 150405696 = 8578^2 + 12264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 223987780.

It is not an unprimeable number, because it can be changed into a prime (223987781) 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, 5599675 + ... + 5599714.

It is an arithmetic number, because the mean of its divisors is an integer number (39197865).

Almost surely, 2^223987780 is an apocalyptic number.

223987780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223987780 is an abundant number, since it is smaller than the sum of its proper divisors (246386600).

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

223987780 is a wasteful number, since it uses less digits than its factorization.

223987780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11199398 (or 11199396 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 223987780 is about 14966.2212999808. The cubic root of 223987780 is about 607.3067503894.

The spelling of 223987780 in words is "two hundred twenty-three million, nine hundred eighty-seven thousand, seven hundred eighty".