28017404 has 12 divisors (see below), whose sum is σ = 51162384. Its totient is φ = 13399584.

The previous prime is 28017403. The next prime is 28017413. The reversal of 28017404 is 40471082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28017401) 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, 152177 + ... + 152360.

It is an arithmetic number, because the mean of its divisors is an integer number (4263532).

Almost surely, 2^28017404 is an apocalyptic number.

It is an amenable number.

28017404 is a deficient number, since it is larger than the sum of its proper divisors (23144980).

28017404 is a wasteful number, since it uses less digits than its factorization.

28017404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304564 (or 304562 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 28017404 is about 5293.1468900834. The cubic root of 28017404 is about 303.7217993881.

Adding to 28017404 its reverse (40471082), we get a palindrome (68488486).

The spelling of 28017404 in words is "twenty-eight million, seventeen thousand, four hundred four".