28120604 has 12 divisors (see below), whose sum is σ = 50908200. Its totient is φ = 13575408.

The previous prime is 28120577. The next prime is 28120607. The reversal of 28120604 is 40602182.

It is a self number, because there is not a number n which added to its sum of digits gives 28120604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28120607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121094 + ... + 121325.

It is an arithmetic number, because the mean of its divisors is an integer number (4242350).

Almost surely, 2^28120604 is an apocalyptic number.

It is an amenable number.

28120604 is a deficient number, since it is larger than the sum of its proper divisors (22787596).

28120604 is a wasteful number, since it uses less digits than its factorization.

28120604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242452 (or 242450 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28120604 is about 5302.8863838480. The cubic root of 28120604 is about 304.0942545916.

Adding to 28120604 its reverse (40602182), we get a palindrome (68722786).

The spelling of 28120604 in words is "twenty-eight million, one hundred twenty thousand, six hundred four".