23402405140 has 96 divisors (see below), whose sum is σ = 51165886464. Its totient is φ = 8984545920.

The previous prime is 23402405087. The next prime is 23402405141. The reversal of 23402405140 is 4150420432.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23402405141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29735827 + ... + 29736613.

It is an arithmetic number, because the mean of its divisors is an integer number (532977984).

Almost surely, 2^23402405140 is an apocalyptic number.

23402405140 is a gapful number since it is divisible by the number (20) 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 23402405140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25582943232).

23402405140 is an abundant number, since it is smaller than the sum of its proper divisors (27763481324).

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

23402405140 is a wasteful number, since it uses less digits than its factorization.

23402405140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 23402405140 its reverse (4150420432), we get a palindrome (27552825572).

The spelling of 23402405140 in words is "twenty-three billion, four hundred two million, four hundred five thousand, one hundred forty".