28731803 has 2 divisors, whose sum is σ = 28731804. Its totient is φ = 28731802.

The previous prime is 28731797. The next prime is 28731809. The reversal of 28731803 is 30813782.

It is a balanced prime because it is at equal distance from previous prime (28731797) and next prime (28731809).

It is a cyclic number.

It is not a de Polignac number, because 28731803 - 2⁶ = 28731739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28731803.

It is not a weakly prime, because it can be changed into another prime (28731809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14365901 + 14365902.

It is an arithmetic number, because the mean of its divisors is an integer number (14365902).

Almost surely, 2^28731803 is an apocalyptic number.

28731803 is a deficient number, since it is larger than the sum of its proper divisors (1).

28731803 is an equidigital number, since it uses as much as digits as its factorization.

28731803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28731803 is about 5360.2054997920. The cubic root of 28731803 is about 306.2816372703.

The spelling of 28731803 in words is "twenty-eight million, seven hundred thirty-one thousand, eight hundred three".