28735004 has 24 divisors (see below), whose sum is σ = 52660608. Its totient is φ = 13693680.

The previous prime is 28734991. The next prime is 28735009. The reversal of 28735004 is 40053782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28735009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50039 + ... + 50609.

It is an arithmetic number, because the mean of its divisors is an integer number (2194192).

Almost surely, 2^28735004 is an apocalyptic number.

It is an amenable number.

28735004 is a deficient number, since it is larger than the sum of its proper divisors (23925604).

28735004 is a wasteful number, since it uses less digits than its factorization.

28735004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1143 counting only the distinct ones).

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

The square root of 28735004 is about 5360.5040807745. The cubic root of 28735004 is about 306.2930110908.

Adding to 28735004 its reverse (40053782), we get a palindrome (68788786).

The spelling of 28735004 in words is "twenty-eight million, seven hundred thirty-five thousand, four".