1128919680 has 768 divisors, whose sum is σ = 4972181760. Its totient is φ = 238878720.

The previous prime is 1128919679. The next prime is 1128919681. The reversal of 1128919680 is 869198211.

It is an interprime number because it is at equal distance from previous prime (1128919679) and next prime (1128919681).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128919681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18506850 + ... + 18506910.

It is an arithmetic number, because the mean of its divisors is an integer number (6474195).

Almost surely, 2^1128919680 is an apocalyptic number.

1128919680 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 1128919680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2486090880).

1128919680 is an abundant number, since it is smaller than the sum of its proper divisors (3843262080).

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

1128919680 is an equidigital number, since it uses as much as digits as its factorization.

1128919680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1128919680 is about 33599.3999946428. The cubic root of 1128919680 is about 1041.2484022156.

The spelling of 1128919680 in words is "one billion, one hundred twenty-eight million, nine hundred nineteen thousand, six hundred eighty".