1118891928 has 128 divisors (see below), whose sum is σ = 3600138240. Its totient is φ = 281232000.

The previous prime is 1118891923. The next prime is 1118891933. The reversal of 1118891928 is 8291988111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1118891923) and next prime (1118891933).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118891923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47523 + ... + 67053.

It is an arithmetic number, because the mean of its divisors is an integer number (28126080).

Almost surely, 2^1118891928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118891928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800069120).

1118891928 is an abundant number, since it is smaller than the sum of its proper divisors (2481246312).

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

1118891928 is a wasteful number, since it uses less digits than its factorization.

1118891928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19589 (or 19585 counting only the distinct ones).

The product of its digits is 82944, while the sum is 48.

The square root of 1118891928 is about 33449.8419727209. The cubic root of 1118891928 is about 1038.1562277614.

The spelling of 1118891928 in words is "one billion, one hundred eighteen million, eight hundred ninety-one thousand, nine hundred twenty-eight".