28678004 has 6 divisors (see below), whose sum is σ = 50186514. Its totient is φ = 14339000.

The previous prime is 28677989. The next prime is 28678019. The reversal of 28678004 is 40087682.

It is an interprime number because it is at equal distance from previous prime (28677989) and next prime (28678019).

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 8410000 = 4502^2 + 2900^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3584747 + ... + 3584754.

It is an arithmetic number, because the mean of its divisors is an integer number (8364419).

Almost surely, 2^28678004 is an apocalyptic number.

It is an amenable number.

28678004 is a deficient number, since it is larger than the sum of its proper divisors (21508510).

28678004 is a wasteful number, since it uses less digits than its factorization.

28678004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169505 (or 7169503 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28678004 is about 5355.1847773910. The cubic root of 28678004 is about 306.0903516640.

The spelling of 28678004 in words is "twenty-eight million, six hundred seventy-eight thousand, four".