23255032440 has 128 divisors (see below), whose sum is σ = 71223566400. Its totient is φ = 6072606720.

The previous prime is 23255032429. The next prime is 23255032453. The reversal of 23255032440 is 4423055232.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23255032398 and 23255032407.

It is a congruent number.

It is an unprimeable number.

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, 1669344 + ... + 1683216.

Almost surely, 2^23255032440 is an apocalyptic number.

23255032440 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 23255032440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35611783200).

23255032440 is an abundant number, since it is smaller than the sum of its proper divisors (47968533960).

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

23255032440 is a wasteful number, since it uses less digits than its factorization.

23255032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177 (or 14173 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 23255032440 its reverse (4423055232), we get a palindrome (27678087672).

The spelling of 23255032440 in words is "twenty-three billion, two hundred fifty-five million, thirty-two thousand, four hundred forty".