1223344567890 has 64 divisors (see below), whose sum is σ = 3454149381120. Its totient is φ = 307035498240.

The previous prime is 1223344567889. The next prime is 1223344567897. The reversal of 1223344567890 is 987654433221.

1223344567890 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 34 + 456 + 78 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1223344567897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133257346 + ... + 133266525.

It is an arithmetic number, because the mean of its divisors is an integer number (53971084080).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1223344567890 = 2446689135780, but 3⋅1223344567890 = 3670033703670 is not.

Almost surely, 2^{1223344567890} is an apocalyptic number.

1223344567890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223344567890 is an abundant number, since it is smaller than the sum of its proper divisors (2230804813230).

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

1223344567890 is a wasteful number, since it uses less digits than its factorization.

1223344567890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266523904 (or 266523898 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 1223344567890 in words is "one trillion, two hundred twenty-three billion, three hundred forty-four million, five hundred sixty-seven thousand, eight hundred ninety".