28807376 has 20 divisors (see below), whose sum is σ = 60108132. Its totient is φ = 13295616.

The previous prime is 28807369. The next prime is 28807403. The reversal of 28807376 is 67370882.

It can be written as a sum of positive squares in 2 ways, for example, as 2016400 + 26790976 = 1420^2 + 5176^2 .

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, 69041 + ... + 69456.

Almost surely, 2^28807376 is an apocalyptic number.

28807376 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28807376 is an abundant number, since it is smaller than the sum of its proper divisors (31300756).

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

28807376 is a wasteful number, since it uses less digits than its factorization.

28807376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138518 (or 138512 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28807376 is about 5367.2503202292. The cubic root of 28807376 is about 306.5499387718.

The spelling of 28807376 in words is "twenty-eight million, eight hundred seven thousand, three hundred seventy-six".