28787472 has 60 divisors (see below), whose sum is σ = 92077440. Its totient is φ = 8224704.

The previous prime is 28787461. The next prime is 28787483. The reversal of 28787472 is 27478782.

It is an interprime number because it is at equal distance from previous prime (28787461) and next prime (28787483).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 13272 + ... + 15287.

It is an arithmetic number, because the mean of its divisors is an integer number (1534624).

Almost surely, 2^28787472 is an apocalyptic number.

It is an amenable number.

28787472 is an abundant number, since it is smaller than the sum of its proper divisors (63289968).

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

28787472 is a wasteful number, since it uses less digits than its factorization.

28787472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28580 (or 28571 counting only the distinct ones).

The product of its digits is 351232, while the sum is 45.

The square root of 28787472 is about 5365.3957915516. The cubic root of 28787472 is about 306.4793205641.

The spelling of 28787472 in words is "twenty-eight million, seven hundred eighty-seven thousand, four hundred seventy-two".