113781620 has 24 divisors (see below), whose sum is σ = 239841000. Its totient is φ = 45341312.

The previous prime is 113781617. The next prime is 113781631. The reversal of 113781620 is 26187311.

It can be written as a sum of positive squares in 4 ways, for example, as 3363556 + 110418064 = 1834^2 + 10508^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5195 + ... + 15954.

It is an arithmetic number, because the mean of its divisors is an integer number (9993375).

Almost surely, 2^113781620 is an apocalyptic number.

113781620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113781620 is an abundant number, since it is smaller than the sum of its proper divisors (126059380).

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

113781620 is a wasteful number, since it uses less digits than its factorization.

113781620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21427 (or 21425 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 113781620 is about 10666.8467693129. The cubic root of 113781620 is about 484.5709458770.

The spelling of 113781620 in words is "one hundred thirteen million, seven hundred eighty-one thousand, six hundred twenty".