123440004402 has 64 divisors (see below), whose sum is σ = 290217997440. Its totient is φ = 34507584000.

The previous prime is 123440004383. The next prime is 123440004409. The reversal of 123440004402 is 204400044321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123440004409) 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, 1388902 + ... + 1475102.

It is an arithmetic number, because the mean of its divisors is an integer number (4534656210).

Almost surely, 2^123440004402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123440004402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145108998720).

123440004402 is an abundant number, since it is smaller than the sum of its proper divisors (166777993038).

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

123440004402 is a wasteful number, since it uses less digits than its factorization.

123440004402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87899.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 123440004402 its reverse (204400044321), we get a palindrome (327840048723).

The spelling of 123440004402 in words is "one hundred twenty-three billion, four hundred forty million, four thousand, four hundred two".