15985428 has 12 divisors (see below), whose sum is σ = 37299360. Its totient is φ = 5328472.

The previous prime is 15985427. The next prime is 15985433. The reversal of 15985428 is 82458951.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 15985428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15985427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666048 + ... + 666071.

It is an arithmetic number, because the mean of its divisors is an integer number (3108280).

Almost surely, 2^15985428 is an apocalyptic number.

It is an amenable number.

15985428 is an abundant number, since it is smaller than the sum of its proper divisors (21313932).

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

15985428 is a wasteful number, since it uses less digits than its factorization.

15985428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332126 (or 1332124 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 15985428 is about 3998.1780850783. The cubic root of 15985428 is about 251.9076885372.

The spelling of 15985428 in words is "fifteen million, nine hundred eighty-five thousand, four hundred twenty-eight".