1223040143440 has 40 divisors (see below), whose sum is σ = 2843669422080. Its totient is φ = 489198665856.

The previous prime is 1223040143393. The next prime is 1223040143461. The reversal of 1223040143440 is 443410403221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1223040143399 and 1223040143408.

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, 2123857 + ... + 2637583.

It is an arithmetic number, because the mean of its divisors is an integer number (71091735552).

Almost surely, 2^{1223040143440} is an apocalyptic number.

1223040143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223040143440 is an abundant number, since it is smaller than the sum of its proper divisors (1620629278640).

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

1223040143440 is a wasteful number, since it uses less digits than its factorization.

1223040143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543499 (or 543493 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1223040143440 its reverse (443410403221), we get a palindrome (1666450546661).

The spelling of 1223040143440 in words is "one trillion, two hundred twenty-three billion, forty million, one hundred forty-three thousand, four hundred forty".