23947485440 has 72 divisors (see below), whose sum is σ = 59339793240. Its totient is φ = 9248669696.

The previous prime is 23947485439. The next prime is 23947485467. The reversal of 23947485440 is 4458474932.

It can be written as a sum of positive squares in 4 ways, for example, as 152571904 + 23794913536 = 12352^2 + 154256^2 .

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, 285449 + ... + 359688.

It is an arithmetic number, because the mean of its divisors is an integer number (824163795).

Almost surely, 2^23947485440 is an apocalyptic number.

23947485440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23947485440 is an abundant number, since it is smaller than the sum of its proper divisors (35392307800).

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

23947485440 is an equidigital number, since it uses as much as digits as its factorization.

23947485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645187 (or 645173 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 50.

The spelling of 23947485440 in words is "twenty-three billion, nine hundred forty-seven million, four hundred eighty-five thousand, four hundred forty".