15668428 has 24 divisors (see below), whose sum is σ = 29016288. Its totient is φ = 7387776.

The previous prime is 15668413. The next prime is 15668431. The reversal of 15668428 is 82486651.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5550 + ... + 7882.

It is an arithmetic number, because the mean of its divisors is an integer number (1209012).

Almost surely, 2^15668428 is an apocalyptic number.

It is an amenable number.

15668428 is a deficient number, since it is larger than the sum of its proper divisors (13347860).

15668428 is a wasteful number, since it uses less digits than its factorization.

15668428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2431 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 15668428 is about 3958.3365192970. The cubic root of 15668428 is about 250.2314017468.

The spelling of 15668428 in words is "fifteen million, six hundred sixty-eight thousand, four hundred twenty-eight".