28539416 has 16 divisors (see below), whose sum is σ = 53586600. Its totient is φ = 14249664.

The previous prime is 28539409. The next prime is 28539419. The reversal of 28539416 is 61493582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28539416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539419) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4796 + ... + 8948.

Almost surely, 2^28539416 is an apocalyptic number.

It is an amenable number.

28539416 is a deficient number, since it is larger than the sum of its proper divisors (25047184).

28539416 is a wasteful number, since it uses less digits than its factorization.

28539416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018 (or 5014 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 28539416 is about 5342.2294971295. The cubic root of 28539416 is about 305.5964892281.

The spelling of 28539416 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred sixteen".