28006604 has 12 divisors (see below), whose sum is σ = 49130928. Its totient is φ = 13969200.

The previous prime is 28006597. The next prime is 28006613. The reversal of 28006604 is 40660082.

It is a super-2 number, since 2×28006604² = 1568739735225632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 6632 + ... + 9999.

It is an arithmetic number, because the mean of its divisors is an integer number (4094244).

Almost surely, 2^28006604 is an apocalyptic number.

It is an amenable number.

28006604 is a deficient number, since it is larger than the sum of its proper divisors (21124324).

28006604 is a wasteful number, since it uses less digits than its factorization.

28006604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17056 (or 17054 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28006604 is about 5292.1266046836. The cubic root of 28006604 is about 303.6827686842.

Adding to 28006604 its reverse (40660082), we get a palindrome (68666686).

The spelling of 28006604 in words is "twenty-eight million, six thousand, six hundred four".