223307428 has 36 divisors (see below), whose sum is σ = 405215580. Its totient is φ = 107666496.

The previous prime is 223307417. The next prime is 223307429. The reversal of 223307428 is 824703322.

It can be written as a sum of positive squares in 2 ways, for example, as 94439524 + 128867904 = 9718^2 + 11352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 223307428.

It is not an unprimeable number, because it can be changed into a prime (223307429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 806026 + ... + 806302.

Almost surely, 2^223307428 is an apocalyptic number.

It is an amenable number.

223307428 is a deficient number, since it is larger than the sum of its proper divisors (181908152).

223307428 is a wasteful number, since it uses less digits than its factorization.

223307428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 223307428 is about 14943.4744286595. The cubic root of 223307428 is about 606.6912385223.

The spelling of 223307428 in words is "two hundred twenty-three million, three hundred seven thousand, four hundred twenty-eight".