28980569 has 8 divisors (see below), whose sum is σ = 29366400. Its totient is φ = 28597536.

The previous prime is 28980557. The next prime is 28980577. The reversal of 28980569 is 96508982.

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 28980569 - 2⁸ = 28980313 is a prime.

It is a super-2 number, since 2×28980569² = 1679746759127522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28980169) 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, 26732 + ... + 27794.

It is an arithmetic number, because the mean of its divisors is an integer number (3670800).

Almost surely, 2^28980569 is an apocalyptic number.

It is an amenable number.

28980569 is a deficient number, since it is larger than the sum of its proper divisors (385831).

28980569 is a wasteful number, since it uses less digits than its factorization.

28980569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 28980569 is about 5383.3603817690. The cubic root of 28980569 is about 307.1630486301.

The spelling of 28980569 in words is "twenty-eight million, nine hundred eighty thousand, five hundred sixty-nine".