220400234 has 4 divisors (see below), whose sum is σ = 330600354. Its totient is φ = 110200116.

The previous prime is 220400233. The next prime is 220400239. The reversal of 220400234 is 432004022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 148913209 + 71487025 = 12203^2 + 8455^2 .

It is not an unprimeable number, because it can be changed into a prime (220400233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55100057 + ... + 55100060.

Almost surely, 2^220400234 is an apocalyptic number.

220400234 is a deficient number, since it is larger than the sum of its proper divisors (110200120).

220400234 is a wasteful number, since it uses less digits than its factorization.

220400234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110200119.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 220400234 is about 14845.8827288915. The cubic root of 220400234 is about 604.0469332564.

Adding to 220400234 its reverse (432004022), we get a palindrome (652404256).

The spelling of 220400234 in words is "two hundred twenty million, four hundred thousand, two hundred thirty-four".