28660616 has 32 divisors (see below), whose sum is σ = 55891200. Its totient is φ = 13763520.

The previous prime is 28660609. The next prime is 28660663. The reversal of 28660616 is 61606682.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40070 + ... + 40778.

It is an arithmetic number, because the mean of its divisors is an integer number (1746600).

Almost surely, 2^28660616 is an apocalyptic number.

It is an amenable number.

28660616 is a deficient number, since it is larger than the sum of its proper divisors (27230584).

28660616 is a wasteful number, since it uses less digits than its factorization.

28660616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28660616 is about 5353.5610578380. The cubic root of 28660616 is about 306.0284764249.

The spelling of 28660616 in words is "twenty-eight million, six hundred sixty thousand, six hundred sixteen".