1115422020 has 144 divisors (see below), whose sum is σ = 3618276480. Its totient is φ = 277152768.

The previous prime is 1115422019. The next prime is 1115422031. The reversal of 1115422020 is 202245111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1115421984 and 1115422002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 313411 + ... + 316949.

It is an arithmetic number, because the mean of its divisors is an integer number (25126920).

Almost surely, 2^1115422020 is an apocalyptic number.

1115422020 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 1115422020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809138240).

1115422020 is an abundant number, since it is smaller than the sum of its proper divisors (2502854460).

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

1115422020 is a wasteful number, since it uses less digits than its factorization.

1115422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674 (or 3669 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1115422020 is about 33397.9343672629. The cubic root of 1115422020 is about 1037.0819396604.

Adding to 1115422020 its reverse (202245111), we get a palindrome (1317667131).

The spelling of 1115422020 in words is "one billion, one hundred fifteen million, four hundred twenty-two thousand, twenty".