13444420 has 48 divisors (see below), whose sum is σ = 32151168. Its totient is φ = 4674560.

The previous prime is 13444373. The next prime is 13444469. The reversal of 13444420 is 2444431.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 13444391 and 13444400.

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, 3732 + ... + 6388.

It is an arithmetic number, because the mean of its divisors is an integer number (669816).

Almost surely, 2^13444420 is an apocalyptic number.

13444420 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 13444420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16075584).

13444420 is an abundant number, since it is smaller than the sum of its proper divisors (18706748).

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

13444420 is a wasteful number, since it uses less digits than its factorization.

13444420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700 (or 2698 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 13444420 is about 3666.6633333318. The cubic root of 13444420 is about 237.7829388799.

Adding to 13444420 its reverse (2444431), we get a palindrome (15888851).

It can be divided in two parts, 13444 and 420, that multiplied together give a triangular number (5646480 = T₃₃₆₀).

The spelling of 13444420 in words is "thirteen million, four hundred forty-four thousand, four hundred twenty".