13504428 has 48 divisors (see below), whose sum is σ = 40015360. Its totient is φ = 3858192.

The previous prime is 13504423. The next prime is 13504429. The reversal of 13504428 is 82440531.

It is a super-3 number, since 3×13504428³ (a number of 22 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (13504423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 9687.

Almost surely, 2^13504428 is an apocalyptic number.

13504428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13504428 is an abundant number, since it is smaller than the sum of its proper divisors (26510932).

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

13504428 is a wasteful number, since it uses less digits than its factorization.

13504428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17883 (or 17875 counting only the distinct ones).

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

The square root of 13504428 is about 3674.8371392485. The cubic root of 13504428 is about 238.1361883267.

Adding to 13504428 its reverse (82440531), we get a palindrome (95944959).

It can be divided in two parts, 1350 and 4428, that added together give a triangular number (5778 = T₁₀₇).

The spelling of 13504428 in words is "thirteen million, five hundred four thousand, four hundred twenty-eight".