223400340 has 72 divisors (see below), whose sum is σ = 701031240. Its totient is φ = 57517824.

The previous prime is 223400329. The next prime is 223400363. The reversal of 223400340 is 43004322.

223400340 is a `hidden beast` number, since 223 + 400 + 3 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 78535044 + 144865296 = 8862^2 + 12036^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16179 + ... + 26618.

It is an arithmetic number, because the mean of its divisors is an integer number (9736545).

Almost surely, 2^223400340 is an apocalyptic number.

223400340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223400340 is an abundant number, since it is smaller than the sum of its proper divisors (477630900).

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

223400340 is a wasteful number, since it uses less digits than its factorization.

223400340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42841 (or 42836 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 223400340 is about 14946.5828870682. The cubic root of 223400340 is about 606.7753692963.

Adding to 223400340 its reverse (43004322), we get a palindrome (266404662).

The spelling of 223400340 in words is "two hundred twenty-three million, four hundred thousand, three hundred forty".