1223887968 has 72 divisors (see below), whose sum is σ = 3609359208. Its totient is φ = 407960064.

The previous prime is 1223887949. The next prime is 1223887969. The reversal of 1223887968 is 8697883221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223887969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70921 + ... + 86472.

It is an arithmetic number, because the mean of its divisors is an integer number (50129989).

Almost surely, 2^1223887968 is an apocalyptic number.

1223887968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1223887968 is an abundant number, since it is smaller than the sum of its proper divisors (2385471240).

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

1223887968 is an equidigital number, since it uses as much as digits as its factorization.

1223887968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157418 (or 157398 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1223887968 is about 34984.1102216421. The cubic root of 1223887968 is about 1069.6636110293.

The spelling of 1223887968 in words is "one billion, two hundred twenty-three million, eight hundred eighty-seven thousand, nine hundred sixty-eight".