1243442988 has 30 divisors (see below), whose sum is σ = 3250606436. Its totient is φ = 414480888.

The previous prime is 1243442969. The next prime is 1243442989. The reversal of 1243442988 is 8892443421.

1243442988 is a `hidden beast` number, since 12 + 4 + 344 + 298 + 8 = 666.

1243442988 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1243442989) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1918570 + ... + 1919217.

Almost surely, 2^1243442988 is an apocalyptic number.

1243442988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1243442988 is an abundant number, since it is smaller than the sum of its proper divisors (2007163448).

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

1243442988 is a wasteful number, since it uses less digits than its factorization.

1243442988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837803 (or 3837792 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1243442988 is about 35262.4869797920. The cubic root of 1243442988 is about 1075.3304880395.

The spelling of 1243442988 in words is "one billion, two hundred forty-three million, four hundred forty-two thousand, nine hundred eighty-eight".