28799707 has 4 divisors (see below), whose sum is σ = 28814896. Its totient is φ = 28784520.

The previous prime is 28799681. The next prime is 28799711. The reversal of 28799707 is 70799782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28799707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28799737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4263 + ... + 8704.

It is an arithmetic number, because the mean of its divisors is an integer number (7203724).

Almost surely, 2^28799707 is an apocalyptic number.

28799707 is a deficient number, since it is larger than the sum of its proper divisors (15189).

28799707 is a wasteful number, since it uses less digits than its factorization.

28799707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15188.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 28799707 is about 5366.5358472668. The cubic root of 28799707 is about 306.5227334693.

The spelling of 28799707 in words is "twenty-eight million, seven hundred ninety-nine thousand, seven hundred seven".