28787487 has 8 divisors (see below), whose sum is σ = 38431536. Its totient is φ = 19167552.

The previous prime is 28787483. The next prime is 28787491. The reversal of 28787487 is 78478782.

It is an interprime number because it is at equal distance from previous prime (28787483) and next prime (28787491).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28787487 - 2² = 28787483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28787483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3028 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (4803942).

Almost surely, 2^28787487 is an apocalyptic number.

28787487 is a deficient number, since it is larger than the sum of its proper divisors (9644049).

28787487 is a wasteful number, since it uses less digits than its factorization.

28787487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12057.

The product of its digits is 1404928, while the sum is 51.

The square root of 28787487 is about 5365.3971893980. The cubic root of 28787487 is about 306.4793737955.

The spelling of 28787487 in words is "twenty-eight million, seven hundred eighty-seven thousand, four hundred eighty-seven".