28987759 has 6 divisors (see below), whose sum is σ = 29953824. Its totient is φ = 28023660.

The previous prime is 28987747. The next prime is 28987769. The reversal of 28987759 is 95778982.

It is not a de Polignac number, because 28987759 - 2¹¹ = 28985711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28987769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29494 + ... + 30460.

It is an arithmetic number, because the mean of its divisors is an integer number (4992304).

Almost surely, 2^28987759 is an apocalyptic number.

28987759 is a deficient number, since it is larger than the sum of its proper divisors (966065).

28987759 is an frugal number, since it uses more digits than its factorization.

28987759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 998 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 55.

The square root of 28987759 is about 5384.0281388566. The cubic root of 28987759 is about 307.1884486341.

The spelling of 28987759 in words is "twenty-eight million, nine hundred eighty-seven thousand, seven hundred fifty-nine".