23400323432440 has 32 divisors (see below), whose sum is σ = 52676004304080. Its totient is φ = 9355635758592.

The previous prime is 23400323432419. The next prime is 23400323432579. The reversal of 23400323432440 is 4423432300432.

It is a junction number, because it is equal to n+sod(n) for n = 23400323432396 and 23400323432405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140341089 + ... + 140507728.

Almost surely, 2^{23400323432440} is an apocalyptic number.

23400323432440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23400323432440 is an abundant number, since it is smaller than the sum of its proper divisors (29275680871640).

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

23400323432440 is a wasteful number, since it uses less digits than its factorization.

23400323432440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280850911 (or 280850907 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 34.

Adding to 23400323432440 its reverse (4423432300432), we get a palindrome (27823755732872).

The spelling of 23400323432440 in words is "twenty-three trillion, four hundred billion, three hundred twenty-three million, four hundred thirty-two thousand, four hundred forty".