1223588988 has 72 divisors (see below), whose sum is σ = 3143457408. Its totient is φ = 401247648.

The previous prime is 1223588987. The next prime is 1223589011. The reversal of 1223588988 is 8898853221.

It is a super-3 number, since 3×1223588988³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223588981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 844881 + ... + 846327.

Almost surely, 2^1223588988 is an apocalyptic number.

1223588988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223588988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571728704).

1223588988 is an abundant number, since it is smaller than the sum of its proper divisors (1919868420).

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

1223588988 is a wasteful number, since it uses less digits than its factorization.

1223588988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1818 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The square root of 1223588988 is about 34979.8368778358. The cubic root of 1223588988 is about 1069.5765022743.

The spelling of 1223588988 in words is "one billion, two hundred twenty-three million, five hundred eighty-eight thousand, nine hundred eighty-eight".