1113938280 has 384 divisors, whose sum is σ = 4581158400. Its totient is φ = 228427776.

The previous prime is 1113938261. The next prime is 1113938281. The reversal of 1113938280 is 828393111.

1113938280 is a `hidden beast` number, since 111 + 393 + 82 + 80 = 666.

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 (1113938281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1211661 + ... + 1212579.

It is an arithmetic number, because the mean of its divisors is an integer number (11930100).

Almost surely, 2^1113938280 is an apocalyptic number.

1113938280 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 1113938280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2290579200).

1113938280 is an abundant number, since it is smaller than the sum of its proper divisors (3467220120).

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

1113938280 is a wasteful number, since it uses less digits than its factorization.

1113938280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1113938280 is about 33375.7139249485. The cubic root of 1113938280 is about 1036.6218917374.

The spelling of 1113938280 in words is "one billion, one hundred thirteen million, nine hundred thirty-eight thousand, two hundred eighty".