1118778 has 16 divisors (see below), whose sum is σ = 2251200. Its totient is φ = 370656.

The previous prime is 1118773. The next prime is 1118779. The reversal of 1118778 is 8778111.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1118773) 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, 726 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (140700).

2^1118778 is an apocalyptic number.

1118778 is an abundant number, since it is smaller than the sum of its proper divisors (1132422).

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

1118778 is a wasteful number, since it uses less digits than its factorization.

1118778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its digits is 3136, while the sum is 33.

The square root of 1118778 is about 1057.7230261274. The cubic root of 1118778 is about 103.8120990793.

The spelling of 1118778 in words is "one million, one hundred eighteen thousand, seven hundred seventy-eight".