28740004 has 12 divisors (see below), whose sum is σ = 50374044. Its totient is φ = 14347424.

The previous prime is 28739999. The next prime is 28740011. The reversal of 28740004 is 40004782.

It can be written as a sum of positive squares in 2 ways, for example, as 28643904 + 96100 = 5352^2 + 310^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2599 + ... + 8014.

It is an arithmetic number, because the mean of its divisors is an integer number (4197837).

Almost surely, 2^28740004 is an apocalyptic number.

It is an amenable number.

28740004 is a deficient number, since it is larger than the sum of its proper divisors (21634040).

28740004 is a wasteful number, since it uses less digits than its factorization.

28740004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11294 (or 11292 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 28740004 is about 5360.9704345389. The cubic root of 28740004 is about 306.3107754435.

Adding to 28740004 its reverse (40004782), we get a palindrome (68744786).

The spelling of 28740004 in words is "twenty-eight million, seven hundred forty thousand, four".