1113451620 has 96 divisors (see below), whose sum is σ = 3322626048. Its totient is φ = 277951872.

The previous prime is 1113451529. The next prime is 1113451649. The reversal of 1113451620 is 261543111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56277 + ... + 73443.

It is an arithmetic number, because the mean of its divisors is an integer number (34610688).

Almost surely, 2^1113451620 is an apocalyptic number.

1113451620 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 1113451620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661313024).

1113451620 is an abundant number, since it is smaller than the sum of its proper divisors (2209174428).

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

1113451620 is a wasteful number, since it uses less digits than its factorization.

1113451620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17249 (or 17247 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1113451620 is about 33368.4224979246. The cubic root of 1113451620 is about 1036.4709091371.

Adding to 1113451620 its reverse (261543111), we get a palindrome (1374994731).

The spelling of 1113451620 in words is "one billion, one hundred thirteen million, four hundred fifty-one thousand, six hundred twenty".