223506390 has 16 divisors (see below), whose sum is σ = 536415408. Its totient is φ = 59601696.

The previous prime is 223506383. The next prime is 223506391. The reversal of 223506390 is 93605322.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7450213 = 223506390 / (2 + 2 + 3 + 5 + 0 + 6 + 3 + 9 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223506391) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3725077 + ... + 3725136.

It is an arithmetic number, because the mean of its divisors is an integer number (33525963).

Almost surely, 2^223506390 is an apocalyptic number.

223506390 is an abundant number, since it is smaller than the sum of its proper divisors (312909018).

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

223506390 is a wasteful number, since it uses less digits than its factorization.

223506390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7450223.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 223506390 is about 14950.1300997684. The cubic root of 223506390 is about 606.8713678795.

The spelling of 223506390 in words is "two hundred twenty-three million, five hundred six thousand, three hundred ninety".