13506235428 has 48 divisors (see below), whose sum is σ = 36523920384. Its totient is φ = 3804571680.

The previous prime is 13506235427. The next prime is 13506235439. The reversal of 13506235428 is 82453260531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13506235423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126350 + ... + 1138277.

It is an arithmetic number, because the mean of its divisors is an integer number (760915008).

Almost surely, 2^13506235428 is an apocalyptic number.

It is an amenable number.

13506235428 is an abundant number, since it is smaller than the sum of its proper divisors (23017684956).

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

13506235428 is a wasteful number, since it uses less digits than its factorization.

13506235428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264712 (or 2264710 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 13506235428 its reverse (82453260531), we get a palindrome (95959495959).

The spelling of 13506235428 in words is "thirteen billion, five hundred six million, two hundred thirty-five thousand, four hundred twenty-eight".