28538516 has 12 divisors (see below), whose sum is σ = 50688288. Its totient is φ = 14056152.

The previous prime is 28538491. The next prime is 28538527. The reversal of 28538516 is 61583582.

It is a self number, because there is not a number n which added to its sum of digits gives 28538516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52976 + ... + 53511.

It is an arithmetic number, because the mean of its divisors is an integer number (4224024).

Almost surely, 2^28538516 is an apocalyptic number.

It is an amenable number.

28538516 is a deficient number, since it is larger than the sum of its proper divisors (22149772).

28538516 is a wasteful number, since it uses less digits than its factorization.

28538516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106558 (or 106556 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 28538516 is about 5342.1452619711. The cubic root of 28538516 is about 305.5932768319.

The spelling of 28538516 in words is "twenty-eight million, five hundred thirty-eight thousand, five hundred sixteen".