23440002440 has 16 divisors (see below), whose sum is σ = 52740005580. Its totient is φ = 9376000960.

The previous prime is 23440002427. The next prime is 23440002511. The reversal of 23440002440 is 4420004432.

It can be written as a sum of positive squares in 2 ways, for example, as 22676143396 + 763859044 = 150586^2 + 27638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292999991 + ... + 293000070.

Almost surely, 2^23440002440 is an apocalyptic number.

23440002440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23440002440 is an abundant number, since it is smaller than the sum of its proper divisors (29300003140).

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

23440002440 is a wasteful number, since it uses less digits than its factorization.

23440002440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586000072 (or 586000068 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 23440002440 its reverse (4420004432), we get a palindrome (27860006872).

The spelling of 23440002440 in words is "twenty-three billion, four hundred forty million, two thousand, four hundred forty".