1118761380 has 144 divisors (see below), whose sum is σ = 3714984000. Its totient is φ = 270270720.

The previous prime is 1118761379. The next prime is 1118761403. The reversal of 1118761380 is 831678111.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 690211 + ... + 691829.

It is an arithmetic number, because the mean of its divisors is an integer number (25798500).

Almost surely, 2^1118761380 is an apocalyptic number.

1118761380 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 1118761380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857492000).

1118761380 is an abundant number, since it is smaller than the sum of its proper divisors (2596222620).

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

1118761380 is a wasteful number, since it uses less digits than its factorization.

1118761380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 1118761380 is about 33447.8905164436. The cubic root of 1118761380 is about 1038.1158501678.

The spelling of 1118761380 in words is "one billion, one hundred eighteen million, seven hundred sixty-one thousand, three hundred eighty".