113540238 has 64 divisors (see below), whose sum is σ = 303552000. Its totient is φ = 30730752.

The previous prime is 113540233. The next prime is 113540239. The reversal of 113540238 is 832045311.

It is a happy number.

113540238 is a `hidden beast` number, since 113 + 540 + 2 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113540233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723 + ... + 15086.

It is an arithmetic number, because the mean of its divisors is an integer number (4743000).

Almost surely, 2^113540238 is an apocalyptic number.

113540238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 113540238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151776000).

113540238 is an abundant number, since it is smaller than the sum of its proper divisors (190011762).

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

113540238 is a wasteful number, since it uses less digits than its factorization.

113540238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15846 (or 15840 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 113540238 is about 10655.5261718978. The cubic root of 113540238 is about 484.2280389568.

Adding to 113540238 its reverse (832045311), we get a palindrome (945585549).

The spelling of 113540238 in words is "one hundred thirteen million, five hundred forty thousand, two hundred thirty-eight".