28763307 has 12 divisors (see below), whose sum is σ = 42133104. Its totient is φ = 18905040.

The previous prime is 28763299. The next prime is 28763323. The reversal of 28763307 is 70336782.

It is not a de Polignac number, because 28763307 - 2³ = 28763299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28763377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21868 + ... + 23145.

It is an arithmetic number, because the mean of its divisors is an integer number (3511092).

Almost surely, 2^28763307 is an apocalyptic number.

28763307 is a deficient number, since it is larger than the sum of its proper divisors (13369797).

28763307 is a wasteful number, since it uses less digits than its factorization.

28763307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45090 (or 45087 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 28763307 is about 5363.1433879769. The cubic root of 28763307 is about 306.3935408190.

The spelling of 28763307 in words is "twenty-eight million, seven hundred sixty-three thousand, three hundred seven".