1223400544 has 24 divisors (see below), whose sum is σ = 2513291760. Its totient is φ = 585104256.

The previous prime is 1223400533. The next prime is 1223400551. The reversal of 1223400544 is 4450043221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830379 + ... + 831850.

It is an arithmetic number, because the mean of its divisors is an integer number (104720490).

Almost surely, 2^1223400544 is an apocalyptic number.

It is an amenable number.

1223400544 is an abundant number, since it is smaller than the sum of its proper divisors (1289891216).

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

1223400544 is a wasteful number, since it uses less digits than its factorization.

1223400544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662262 (or 1662254 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1223400544 is about 34977.1431652158. The cubic root of 1223400544 is about 1069.5215912368.

Adding to 1223400544 its reverse (4450043221), we get a palindrome (5673443765).

The spelling of 1223400544 in words is "one billion, two hundred twenty-three million, four hundred thousand, five hundred forty-four".