1123202988 has 36 divisors (see below), whose sum is σ = 3006221400. Its totient is φ = 352377216.

The previous prime is 1123202987. The next prime is 1123203013. The reversal of 1123202988 is 8892023211.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1123202987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917038 + ... + 918261.

It is an arithmetic number, because the mean of its divisors is an integer number (83506150).

Almost surely, 2^1123202988 is an apocalyptic number.

1123202988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1123202988 is an abundant number, since it is smaller than the sum of its proper divisors (1883018412).

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

1123202988 is a wasteful number, since it uses less digits than its factorization.

1123202988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835326 (or 1835321 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1123202988 is about 33514.2206831667. The cubic root of 1123202988 is about 1039.4878481755.

The spelling of 1123202988 in words is "one billion, one hundred twenty-three million, two hundred two thousand, nine hundred eighty-eight".