15234320440 has 64 divisors (see below), whose sum is σ = 34546176000. Its totient is φ = 6046085760.

The previous prime is 15234320429. The next prime is 15234320501. The reversal of 15234320440 is 4402343251.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15234320399 and 15234320408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3198781 + ... + 3203539.

It is an arithmetic number, because the mean of its divisors is an integer number (539784000).

Almost surely, 2^15234320440 is an apocalyptic number.

15234320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15234320440 is an abundant number, since it is smaller than the sum of its proper divisors (19311855560).

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

15234320440 is a wasteful number, since it uses less digits than its factorization.

15234320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380 (or 5376 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 15234320440 its reverse (4402343251), we get a palindrome (19636663691).

The spelling of 15234320440 in words is "fifteen billion, two hundred thirty-four million, three hundred twenty thousand, four hundred forty".