1173840 has 80 divisors (see below), whose sum is σ = 3743808. Its totient is φ = 304128.

The previous prime is 1173829. The next prime is 1173841. The reversal of 1173840 is 483711.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1173840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16044 + ... + 16116.

2^1173840 is an apocalyptic number.

1173840 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 1173840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871904).

1173840 is an abundant number, since it is smaller than the sum of its proper divisors (2569968).

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

1173840 is a wasteful number, since it uses less digits than its factorization.

1173840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1173840 is about 1083.4389692087. The cubic root of 1173840 is about 105.4879780855.

The spelling of 1173840 in words is "one million, one hundred seventy-three thousand, eight hundred forty".