28730804 has 6 divisors (see below), whose sum is σ = 50278914. Its totient is φ = 14365400.

The previous prime is 28730803. The next prime is 28730809. The reversal of 28730804 is 40803782.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 3429904 = 5030^2 + 1852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28730803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3591347 + ... + 3591354.

It is an arithmetic number, because the mean of its divisors is an integer number (8379819).

Almost surely, 2^28730804 is an apocalyptic number.

It is an amenable number.

28730804 is a deficient number, since it is larger than the sum of its proper divisors (21548110).

28730804 is a wasteful number, since it uses less digits than its factorization.

28730804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182705 (or 7182703 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28730804 is about 5360.1123122562. The cubic root of 28730804 is about 306.2780874420.

The spelling of 28730804 in words is "twenty-eight million, seven hundred thirty thousand, eight hundred four".