28351004 has 12 divisors (see below), whose sum is σ = 54124728. Its totient is φ = 12886800.

The previous prime is 28350997. The next prime is 28351007. The reversal of 28351004 is 40015382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28351007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322127 + ... + 322214.

It is an arithmetic number, because the mean of its divisors is an integer number (4510394).

Almost surely, 2^28351004 is an apocalyptic number.

It is an amenable number.

28351004 is a deficient number, since it is larger than the sum of its proper divisors (25773724).

28351004 is a wasteful number, since it uses less digits than its factorization.

28351004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644356 (or 644354 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28351004 is about 5324.5660856074. The cubic root of 28351004 is about 304.9225065150.

Adding to 28351004 its reverse (40015382), we get a palindrome (68366386).

The spelling of 28351004 in words is "twenty-eight million, three hundred fifty-one thousand, four".