28469787 has 8 divisors (see below), whose sum is σ = 38008320. Its totient is φ = 18955560.

The previous prime is 28469773. The next prime is 28469789. The reversal of 28469787 is 78796482.

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

It is not a de Polignac number, because 28469787 - 2⁶ = 28469723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28469789) 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 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 8172.

It is an arithmetic number, because the mean of its divisors is an integer number (4751040).

Almost surely, 2^28469787 is an apocalyptic number.

28469787 is a deficient number, since it is larger than the sum of its proper divisors (9538533).

28469787 is a wasteful number, since it uses less digits than its factorization.

28469787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12153.

The product of its digits is 1354752, while the sum is 51.

The square root of 28469787 is about 5335.7086689586. The cubic root of 28469787 is about 305.3477606384.

The spelling of 28469787 in words is "twenty-eight million, four hundred sixty-nine thousand, seven hundred eighty-seven".