1121939280 has 600 divisors, whose sum is σ = 4876428960. Its totient is φ = 229178880.

The previous prime is 1121939279. The next prime is 1121939297. The reversal of 1121939280 is 829391211.

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

It is a congruent number.

It is an unprimeable number.

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 119 ways as a sum of consecutive naturals, for example, 19015891 + ... + 19015949.

Almost surely, 2^1121939280 is an apocalyptic number.

1121939280 is a gapful number since it is divisible by the number (10) 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 1121939280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438214480).

1121939280 is an abundant number, since it is smaller than the sum of its proper divisors (3754489680).

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

1121939280 is a wasteful number, since it uses less digits than its factorization.

1121939280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1121939280 is about 33495.3620670086. The cubic root of 1121939280 is about 1039.0978616590.

The spelling of 1121939280 in words is "one billion, one hundred twenty-one million, nine hundred thirty-nine thousand, two hundred eighty".