28261204 has 12 divisors (see below), whose sum is σ = 51607584. Its totient is φ = 13516184.

The previous prime is 28261201. The next prime is 28261231. The reversal of 28261204 is 40216282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261201) 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, 153502 + ... + 153685.

It is an arithmetic number, because the mean of its divisors is an integer number (4300632).

Almost surely, 2^28261204 is an apocalyptic number.

It is an amenable number.

28261204 is a deficient number, since it is larger than the sum of its proper divisors (23346380).

28261204 is a wasteful number, since it uses less digits than its factorization.

28261204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307214 (or 307212 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 28261204 is about 5316.1267855460. The cubic root of 28261204 is about 304.6002251317.

Adding to 28261204 its reverse (40216282), we get a palindrome (68477486).

The spelling of 28261204 in words is "twenty-eight million, two hundred sixty-one thousand, two hundred four".