113203440 has 160 divisors (see below), whose sum is σ = 445685760. Its totient is φ = 25871616.

The previous prime is 113203439. The next prime is 113203471. The reversal of 113203440 is 44302311.

113203440 is a `hidden beast` number, since 1 + 1 + 320 + 344 + 0 = 666.

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

It is a congruent 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, 11377 + ... + 18863.

It is an arithmetic number, because the mean of its divisors is an integer number (2785536).

Almost surely, 2^113203440 is an apocalyptic number.

113203440 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 113203440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222842880).

113203440 is an abundant number, since it is smaller than the sum of its proper divisors (332482320).

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

113203440 is a wasteful number, since it uses less digits than its factorization.

113203440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7516 (or 7504 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 113203440 is about 10639.7105223779. The cubic root of 113203440 is about 483.7487711044.

Adding to 113203440 its reverse (44302311), we get a palindrome (157505751).

The spelling of 113203440 in words is "one hundred thirteen million, two hundred three thousand, four hundred forty".