28569693 has 8 divisors (see below), whose sum is σ = 39321856. Its totient is φ = 18432000.

The previous prime is 28569689. The next prime is 28569719. The reversal of 28569693 is 39696582.

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

It is not a de Polignac number, because 28569693 - 2² = 28569689 is a prime.

It is a super-2 number, since 2×28569693² = 1632454716228498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569493) 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, 153508 + ... + 153693.

It is an arithmetic number, because the mean of its divisors is an integer number (4915232).

Almost surely, 2^28569693 is an apocalyptic number.

It is an amenable number.

28569693 is a deficient number, since it is larger than the sum of its proper divisors (10752163).

28569693 is a wasteful number, since it uses less digits than its factorization.

28569693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307235.

The product of its digits is 699840, while the sum is 48.

The square root of 28569693 is about 5345.0624879416. The cubic root of 28569693 is about 305.7045184752.

The spelling of 28569693 in words is "twenty-eight million, five hundred sixty-nine thousand, six hundred ninety-three".