13446489732 has 72 divisors (see below), whose sum is σ = 34304647104. Its totient is φ = 4097149056.

The previous prime is 13446489671. The next prime is 13446489733. The reversal of 13446489732 is 23798464431.

It is a happy number.

It is a super-2 number, since 2×13446489732² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13446489733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176698 + ... + 241070.

It is an arithmetic number, because the mean of its divisors is an integer number (476453432).

Almost surely, 2^13446489732 is an apocalyptic number.

13446489732 is a gapful number since it is divisible by the number (12) 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 13446489732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17152323552).

13446489732 is an abundant number, since it is smaller than the sum of its proper divisors (20858157372).

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

13446489732 is a wasteful number, since it uses less digits than its factorization.

13446489732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64509 (or 64494 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

Subtracting from 13446489732 its sum of digits (51), we obtain a square (13446489681 = 115959²).

The spelling of 13446489732 in words is "thirteen billion, four hundred forty-six million, four hundred eighty-nine thousand, seven hundred thirty-two".