1128780 has 36 divisors (see below), whose sum is σ = 3424512. Its totient is φ = 300960.

The previous prime is 1128779. The next prime is 1128781. The reversal of 1128780 is 878211.

1128780 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (1128779) and next prime (1128781).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1128781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2956 + ... + 3315.

2^1128780 is an apocalyptic number.

1128780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128780 is an abundant number, since it is smaller than the sum of its proper divisors (2295732).

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

1128780 is a wasteful number, since it uses less digits than its factorization.

1128780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286 (or 6281 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1128780 is about 1062.4405865741. The cubic root of 1128780 is about 104.1205456268.

Subtracting from 1128780 its sum of digits (27), we obtain a triangular number (1128753 = T₁₅₀₂).

The spelling of 1128780 in words is "one million, one hundred twenty-eight thousand, seven hundred eighty".