28916745 has 96 divisors (see below), whose sum is σ = 58817664. Its totient is φ = 11980800.

The previous prime is 28916737. The next prime is 28916749. The reversal of 28916745 is 54761982.

28916745 = 325² + 326² + ... + 494².

28916745 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 28916745 - 2³ = 28916737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28916697 and 28916706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916749) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 474015 + ... + 474075.

It is an arithmetic number, because the mean of its divisors is an integer number (612684).

Almost surely, 2^28916745 is an apocalyptic number.

It is an amenable number.

28916745 is an abundant number, since it is smaller than the sum of its proper divisors (29900919).

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

28916745 is a wasteful number, since it uses less digits than its factorization.

28916745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 110 counting only the distinct ones).

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

The square root of 28916745 is about 5377.4292185021. The cubic root of 28916745 is about 306.9373941736.

The spelling of 28916745 in words is "twenty-eight million, nine hundred sixteen thousand, seven hundred forty-five".