23128449240 has 64 divisors (see below), whose sum is σ = 74722687200. Its totient is φ = 5693156352.

The previous prime is 23128449233. The next prime is 23128449241. The reversal of 23128449240 is 4294482132.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128449241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7411405 + ... + 7414524.

Almost surely, 2^23128449240 is an apocalyptic number.

23128449240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23128449240 is an abundant number, since it is smaller than the sum of its proper divisors (51594237960).

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

23128449240 is a wasteful number, since it uses less digits than its factorization.

23128449240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14825956 (or 14825952 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 23128449240 in words is "twenty-three billion, one hundred twenty-eight million, four hundred forty-nine thousand, two hundred forty".