13445028 has 60 divisors (see below), whose sum is σ = 37230732. Its totient is φ = 4216320.

The previous prime is 13445021. The next prime is 13445039. The reversal of 13445028 is 82054431.

13445028 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 5560164 + 7884864 = 2358^2 + 2808^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13444992 and 13445010.

It is not an unprimeable number, because it can be changed into a prime (13445021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4288 + ... + 6728.

Almost surely, 2^13445028 is an apocalyptic number.

13445028 is a gapful number since it is divisible by the number (18) 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 13445028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18615366).

13445028 is an abundant number, since it is smaller than the sum of its proper divisors (23785704).

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

13445028 is a wasteful number, since it uses less digits than its factorization.

13445028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2463 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 13445028 is about 3666.7462415608. The cubic root of 13445028 is about 237.7865232628.

Adding to 13445028 its reverse (82054431), we get a palindrome (95499459).

The spelling of 13445028 in words is "thirteen million, four hundred forty-five thousand, twenty-eight".