223863990 has 128 divisors (see below), whose sum is σ = 659819520. Its totient is φ = 47443968.

The previous prime is 223863971. The next prime is 223864019. The reversal of 223863990 is 99368322.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 260181 + ... + 261039.

It is an arithmetic number, because the mean of its divisors is an integer number (5154840).

Almost surely, 2^223863990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223863990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329909760).

223863990 is an abundant number, since it is smaller than the sum of its proper divisors (435955530).

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

223863990 is a wasteful number, since it uses less digits than its factorization.

223863990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 223863990 is about 14962.0850819664. The cubic root of 223863990 is about 607.1948508974.

The spelling of 223863990 in words is "two hundred twenty-three million, eight hundred sixty-three thousand, nine hundred ninety".