13396443840 has 672 divisors, whose sum is σ = 53041637376. Its totient is φ = 3077775360.

The previous prime is 13396443833. The next prime is 13396443877. The reversal of 13396443840 is 4834469331.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40472475 + ... + 40472805.

It is an arithmetic number, because the mean of its divisors is an integer number (78931008).

Almost surely, 2^13396443840 is an apocalyptic number.

13396443840 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 13396443840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26520818688).

13396443840 is an abundant number, since it is smaller than the sum of its proper divisors (39645193536).

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

13396443840 is a wasteful number, since it uses less digits than its factorization.

13396443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 13396443840 in words is "thirteen billion, three hundred ninety-six million, four hundred forty-three thousand, eight hundred forty".