28004088 has 48 divisors (see below), whose sum is σ = 81443880. Its totient is φ = 8000832.

The previous prime is 28004069. The next prime is 28004089. The reversal of 28004088 is 88040082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28004089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10731 + ... + 13082.

Almost surely, 2^28004088 is an apocalyptic number.

28004088 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28004088 is an abundant number, since it is smaller than the sum of its proper divisors (53439792).

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

28004088 is a wasteful number, since it uses less digits than its factorization.

28004088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23836 (or 23825 counting only the distinct ones).

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

The square root of 28004088 is about 5291.8888877224. Note that the first 5 decimals coincide. The cubic root of 28004088 is about 303.6736745348.

The spelling of 28004088 in words is "twenty-eight million, four thousand, eighty-eight".