28880004 has 48 divisors (see below), whose sum is σ = 69785408. Its totient is φ = 9289728.

The previous prime is 28879999. The next prime is 28880009. The reversal of 28880004 is 40008882.

It is an interprime number because it is at equal distance from previous prime (28879999) and next prime (28880009).

It is not an unprimeable number, because it can be changed into a prime (28880009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49764 + ... + 50340.

Almost surely, 2^28880004 is an apocalyptic number.

It is an amenable number.

28880004 is an abundant number, since it is smaller than the sum of its proper divisors (40905404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28880004 is a wasteful number, since it uses less digits than its factorization.

28880004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 28880004 is about 5374.0119091792. The cubic root of 28880004 is about 306.8073430405.

Adding to 28880004 its reverse (40008882), we get a palindrome (68888886).

The spelling of 28880004 in words is "twenty-eight million, eight hundred eighty thousand, four".