1118122320 has 80 divisors (see below), whose sum is σ = 3961353600. Its totient is φ = 255570432.

The previous prime is 1118122319. The next prime is 1118122337. The reversal of 1118122320 is 232218111.

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 (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331095 + ... + 334454.

It is an arithmetic number, because the mean of its divisors is an integer number (49516920).

Almost surely, 2^1118122320 is an apocalyptic number.

1118122320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118122320 is an abundant number, since it is smaller than the sum of its proper divisors (2843231280).

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

1118122320 is a wasteful number, since it uses less digits than its factorization.

1118122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665572 (or 665566 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1118122320 is about 33438.3360830051. The cubic root of 1118122320 is about 1037.9181479927.

The spelling of 1118122320 in words is "one billion, one hundred eighteen million, one hundred twenty-two thousand, three hundred twenty".