28807338 has 32 divisors (see below), whose sum is σ = 67455360. Its totient is φ = 8029440.

The previous prime is 28807319. The next prime is 28807343. The reversal of 28807338 is 83370882.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28807296 and 28807305.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6643 + ... + 10086.

It is an arithmetic number, because the mean of its divisors is an integer number (2107980).

Almost surely, 2^28807338 is an apocalyptic number.

28807338 is an abundant number, since it is smaller than the sum of its proper divisors (38648022).

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

28807338 is a wasteful number, since it uses less digits than its factorization.

28807338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16782.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28807338 is about 5367.2467802403. The cubic root of 28807338 is about 306.5498039810.

The spelling of 28807338 in words is "twenty-eight million, eight hundred seven thousand, three hundred thirty-eight".