113121808 has 40 divisors (see below), whose sum is σ = 240085080. Its totient is φ = 51394560.

The previous prime is 113121793. The next prime is 113121817. The reversal of 113121808 is 808121311.

It can be written as a sum of positive squares in 4 ways, for example, as 5626384 + 107495424 = 2372^2 + 10368^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718 + ... + 15058.

It is an arithmetic number, because the mean of its divisors is an integer number (6002127).

Almost surely, 2^113121808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113121808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120042540).

113121808 is an abundant number, since it is smaller than the sum of its proper divisors (126963272).

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

113121808 is a wasteful number, since it uses less digits than its factorization.

113121808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14395 (or 14389 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 113121808 is about 10635.8736359549. The cubic root of 113121808 is about 483.6324646402.

The spelling of 113121808 in words is "one hundred thirteen million, one hundred twenty-one thousand, eight hundred eight".