13238929440 has 1152 divisors, whose sum is σ = 56628633600. Its totient is φ = 2874009600.

The previous prime is 13238929439. The next prime is 13238929447. The reversal of 13238929440 is 4492983231.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (13238929447) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 307882059 + ... + 307882101.

It is an arithmetic number, because the mean of its divisors is an integer number (49156800).

Almost surely, 2^13238929440 is an apocalyptic number.

13238929440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13238929440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28314316800).

13238929440 is an abundant number, since it is smaller than the sum of its proper divisors (43389704160).

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

13238929440 is a wasteful number, since it uses less digits than its factorization.

13238929440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 13238929440 in words is "thirteen billion, two hundred thirty-eight million, nine hundred twenty-nine thousand, four hundred forty".