1223400144 has 40 divisors (see below), whose sum is σ = 3185351680. Its totient is φ = 404587008.

The previous prime is 1223400137. The next prime is 1223400161. The reversal of 1223400144 is 4410043221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223400144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94249 + ... + 106440.

It is an arithmetic number, because the mean of its divisors is an integer number (79633792).

Almost surely, 2^1223400144 is an apocalyptic number.

It is an amenable number.

1223400144 is an abundant number, since it is smaller than the sum of its proper divisors (1961951536).

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

1223400144 is a wasteful number, since it uses less digits than its factorization.

1223400144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200827 (or 200821 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1223400144 is about 34977.1374471954. The cubic root of 1223400144 is about 1069.5214746740.

Adding to 1223400144 its reverse (4410043221), we get a palindrome (5633443365).

The spelling of 1223400144 in words is "one billion, two hundred twenty-three million, four hundred thousand, one hundred forty-four".