28081488 has 20 divisors (see below), whose sum is σ = 72543968. Its totient is φ = 9360480.

The previous prime is 28081481. The next prime is 28081499. The reversal of 28081488 is 88418082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081481) 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, 292468 + ... + 292563.

Almost surely, 2^28081488 is an apocalyptic number.

It is an amenable number.

28081488 is an abundant number, since it is smaller than the sum of its proper divisors (44462480).

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

28081488 is a wasteful number, since it uses less digits than its factorization.

28081488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585042 (or 585036 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 28081488 is about 5299.1969202890. The cubic root of 28081488 is about 303.9531899301.

The spelling of 28081488 in words is "twenty-eight million, eighty-one thousand, four hundred eighty-eight".