28700803 has 4 divisors (see below), whose sum is σ = 29948688. Its totient is φ = 27452920.

The previous prime is 28700783. The next prime is 28700813. The reversal of 28700803 is 30800782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30800782 = 2 ⋅15400391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28700803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28700813) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 623908 + ... + 623953.

It is an arithmetic number, because the mean of its divisors is an integer number (7487172).

Almost surely, 2^28700803 is an apocalyptic number.

28700803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28700803 is a deficient number, since it is larger than the sum of its proper divisors (1247885).

28700803 is a wasteful number, since it uses less digits than its factorization.

28700803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247884.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28700803 is about 5357.3130392016. The cubic root of 28700803 is about 306.1714440747.

The spelling of 28700803 in words is "twenty-eight million, seven hundred thousand, eight hundred three".