13609428 has 24 divisors (see below), whose sum is σ = 36292032. Its totient is φ = 3888384.

The previous prime is 13609423. The next prime is 13609433. The reversal of 13609428 is 82490631.

It is an interprime number because it is at equal distance from previous prime (13609423) and next prime (13609433).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13609423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80925 + ... + 81092.

It is an arithmetic number, because the mean of its divisors is an integer number (1512168).

Almost surely, 2^13609428 is an apocalyptic number.

It is an amenable number.

13609428 is an abundant number, since it is smaller than the sum of its proper divisors (22682604).

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

13609428 is a wasteful number, since it uses less digits than its factorization.

13609428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162031 (or 162029 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 13609428 is about 3689.0958241824. The cubic root of 13609428 is about 238.7517832894.

The spelling of 13609428 in words is "thirteen million, six hundred nine thousand, four hundred twenty-eight".