23281887440 has 60 divisors (see below), whose sum is σ = 62968013316. Its totient is φ = 7982360064.

The previous prime is 23281887439. The next prime is 23281887457. The reversal of 23281887440 is 4478818232.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3705400384 + 19576487056 = 60872^2 + 139916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2965709 + ... + 2973548.

Almost surely, 2^23281887440 is an apocalyptic number.

23281887440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23281887440 is an abundant number, since it is smaller than the sum of its proper divisors (39686125876).

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

23281887440 is a wasteful number, since it uses less digits than its factorization.

23281887440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5939284 (or 5939271 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The spelling of 23281887440 in words is "twenty-three billion, two hundred eighty-one million, eight hundred eighty-seven thousand, four hundred forty".