28750969 has 8 divisors (see below), whose sum is σ = 31056200. Its totient is φ = 26459136.

The previous prime is 28750913. The next prime is 28750979. The reversal of 28750969 is 96905782.

It can be written as a sum of positive squares in 4 ways, for example, as 1658944 + 27092025 = 1288^2 + 5205^2 .

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 28750969 - 2¹⁵ = 28718201 is a prime.

It is a super-2 number, since 2×28750969² = 1653236436877922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28750979) 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, 1369 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (3882025).

Almost surely, 2^28750969 is an apocalyptic number.

It is an amenable number.

28750969 is a deficient number, since it is larger than the sum of its proper divisors (2305231).

28750969 is a wasteful number, since it uses less digits than its factorization.

28750969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 28750969 is about 5361.9930063364. The cubic root of 28750969 is about 306.3497254567.

The spelling of 28750969 in words is "twenty-eight million, seven hundred fifty thousand, nine hundred sixty-nine".