1179840 has 56 divisors (see below), whose sum is σ = 3749040. Its totient is φ = 314368.

The previous prime is 1179839. The next prime is 1179847. The reversal of 1179840 is 489711.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1179798 and 1179807.

It is not an unprimeable number, because it can be changed into a prime (1179847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346 + ... + 1574.

2^1179840 is an apocalyptic number.

1179840 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 1179840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874520).

1179840 is an abundant number, since it is smaller than the sum of its proper divisors (2569200).

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

1179840 is a wasteful number, since it uses less digits than its factorization.

1179840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1179840 is about 1086.2044006539. The cubic root of 1179840 is about 105.6674041662.

The spelling of 1179840 in words is "one million, one hundred seventy-nine thousand, eight hundred forty".