28031088 has 20 divisors (see below), whose sum is σ = 72413768. Its totient is φ = 9343680.

The previous prime is 28031083. The next prime is 28031131. The reversal of 28031088 is 88013082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28031083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291943 + ... + 292038.

Almost surely, 2^28031088 is an apocalyptic number.

It is an amenable number.

28031088 is an abundant number, since it is smaller than the sum of its proper divisors (44382680).

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

28031088 is a wasteful number, since it uses less digits than its factorization.

28031088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583992 (or 583986 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28031088 is about 5294.4393470886. The cubic root of 28031088 is about 303.7712383328.

The spelling of 28031088 in words is "twenty-eight million, thirty-one thousand, eighty-eight".