28745916 has 24 divisors (see below), whose sum is σ = 67692240. Its totient is φ = 9493632.

The previous prime is 28745911. The next prime is 28745923. The reversal of 28745916 is 61954782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28745911) 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 7 ways as a sum of consecutive naturals, for example, 9681 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (2820510).

Almost surely, 2^28745916 is an apocalyptic number.

It is an amenable number.

28745916 is an abundant number, since it is smaller than the sum of its proper divisors (38946324).

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

28745916 is a wasteful number, since it uses less digits than its factorization.

28745916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22093 (or 22091 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 28745916 is about 5361.5217988925. The cubic root of 28745916 is about 306.3317773560.

The spelling of 28745916 in words is "twenty-eight million, seven hundred forty-five thousand, nine hundred sixteen".