113640428 has 12 divisors (see below), whose sum is σ = 216949992. Its totient is φ = 51654720.

The previous prime is 113640421. The next prime is 113640481. The reversal of 113640428 is 824046311.

It is a self number, because there is not a number n which added to its sum of digits gives 113640428.

It is not an unprimeable number, because it can be changed into a prime (113640421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1291325 + ... + 1291412.

It is an arithmetic number, because the mean of its divisors is an integer number (18079166).

Almost surely, 2^113640428 is an apocalyptic number.

It is an amenable number.

113640428 is a deficient number, since it is larger than the sum of its proper divisors (103309564).

113640428 is a wasteful number, since it uses less digits than its factorization.

113640428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582752 (or 2582750 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 113640428 is about 10660.2264516285. The cubic root of 113640428 is about 484.3704276669.

Adding to 113640428 its reverse (824046311), we get a palindrome (937686739).

The spelling of 113640428 in words is "one hundred thirteen million, six hundred forty thousand, four hundred twenty-eight".