1423221568 has 56 divisors (see below), whose sum is σ = 2901870752. Its totient is φ = 692181504.

The previous prime is 1423221557. The next prime is 1423221587. The reversal of 1423221568 is 8651223241.

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, 761371 + ... + 763237.

Almost surely, 2^1423221568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423221568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450935376).

1423221568 is an abundant number, since it is smaller than the sum of its proper divisors (1478649184).

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

1423221568 is a wasteful number, since it uses less digits than its factorization.

1423221568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199 (or 2189 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 1423221568 is about 37725.6089149002. The cubic root of 1423221568 is about 1124.8402256718.

The spelling of 1423221568 in words is "one billion, four hundred twenty-three million, two hundred twenty-one thousand, five hundred sixty-eight".