28506516 has 24 divisors (see below), whose sum is σ = 67318944. Its totient is φ = 9387360.

The previous prime is 28506503. The next prime is 28506523. The reversal of 28506516 is 61560582.

It is a congruent number.

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, 13315 + ... + 15306.

It is an arithmetic number, because the mean of its divisors is an integer number (2804956).

Almost surely, 2^28506516 is an apocalyptic number.

It is an amenable number.

28506516 is an abundant number, since it is smaller than the sum of its proper divisors (38812428).

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

28506516 is a wasteful number, since it uses less digits than its factorization.

28506516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28711 (or 28709 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28506516 is about 5339.1493704522. The cubic root of 28506516 is about 305.4790143831.

The spelling of 28506516 in words is "twenty-eight million, five hundred six thousand, five hundred sixteen".