223437690 has 160 divisors (see below), whose sum is σ = 693753984. Its totient is φ = 50544000.

The previous prime is 223437679. The next prime is 223437691. The reversal of 223437690 is 96734322.

It is a happy number.

It is a super-2 number, since 2×223437690² = 99848802625072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (223437691) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 890065 + ... + 890315.

Almost surely, 2^223437690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223437690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346876992).

223437690 is an abundant number, since it is smaller than the sum of its proper divisors (470316294).

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

223437690 is a wasteful number, since it uses less digits than its factorization.

223437690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 223437690 is about 14947.8322843147. The cubic root of 223437690 is about 606.8091827291.

The spelling of 223437690 in words is "two hundred twenty-three million, four hundred thirty-seven thousand, six hundred ninety".