1118780 has 36 divisors (see below), whose sum is σ = 2551752. Its totient is φ = 411840.

The previous prime is 1118779. The next prime is 1118783. The reversal of 1118780 is 878111.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118783) 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, 3215 + ... + 3545.

It is an arithmetic number, because the mean of its divisors is an integer number (70882).

2^1118780 is an apocalyptic number.

1118780 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 1118780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1275876).

1118780 is an abundant number, since it is smaller than the sum of its proper divisors (1432972).

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

1118780 is a wasteful number, since it uses less digits than its factorization.

1118780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 1118780 is about 1057.7239715540. The cubic root of 1118780 is about 103.8121609397.

The spelling of 1118780 in words is "one million, one hundred eighteen thousand, seven hundred eighty".