28004735 has 16 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 20305440.

The previous prime is 28004719. The next prime is 28004737. The reversal of 28004735 is 53740082.

It is a happy number.

It is not a de Polignac number, because 28004735 - 2⁴ = 28004719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28004698 and 28004707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28004737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25814 + ... + 26876.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^28004735 is an apocalyptic number.

28004735 is a deficient number, since it is larger than the sum of its proper divisors (8767105).

28004735 is a wasteful number, since it uses less digits than its factorization.

28004735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28004735 is about 5291.9500186604. The cubic root of 28004735 is about 303.6760131856.

It can be divided in two parts, 280047 and 35, that added together give a palindrome (280082).

The spelling of 28004735 in words is "twenty-eight million, four thousand, seven hundred thirty-five".