1129680 has 80 divisors (see below), whose sum is σ = 3898560. Its totient is φ = 300672.

The previous prime is 1129679. The next prime is 1129693. The reversal of 1129680 is 869211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1899 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (48732).

2^1129680 is an apocalyptic number.

1129680 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 1129680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949280).

1129680 is an abundant number, since it is smaller than the sum of its proper divisors (2768880).

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

1129680 is a wasteful number, since it uses less digits than its factorization.

1129680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1129680 is about 1062.8640552771. The cubic root of 1129680 is about 104.1482107747.

The spelling of 1129680 in words is "one million, one hundred twenty-nine thousand, six hundred eighty".