28987357 has 8 divisors (see below), whose sum is σ = 33163200. Its totient is φ = 24820224.

The previous prime is 28987313. The next prime is 28987367. The reversal of 28987357 is 75378982.

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

It is a cyclic number.

It is not a de Polignac number, because 28987357 - 2¹⁹ = 28463069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28987357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28987367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8394 + ... + 11332.

It is an arithmetic number, because the mean of its divisors is an integer number (4145400).

Almost surely, 2^28987357 is an apocalyptic number.

It is an amenable number.

28987357 is a deficient number, since it is larger than the sum of its proper divisors (4175843).

28987357 is a wasteful number, since it uses less digits than its factorization.

28987357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4355.

The product of its digits is 846720, while the sum is 49.

The square root of 28987357 is about 5383.9908060843. The cubic root of 28987357 is about 307.1870286056.

The spelling of 28987357 in words is "twenty-eight million, nine hundred eighty-seven thousand, three hundred fifty-seven".