28883665 has 8 divisors (see below), whose sum is σ = 34694568. Its totient is φ = 23084160.

The previous prime is 28883611. The next prime is 28883671. The reversal of 28883665 is 56638882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9585216 + 19298449 = 3096^2 + 4393^2 .

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

It is not a de Polignac number, because 28883665 - 2¹¹ = 28881617 is a prime.

It is a super-2 number, since 2×28883665² = 1668532207664450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4419 + ... + 8791.

It is an arithmetic number, because the mean of its divisors is an integer number (4336821).

Almost surely, 2^28883665 is an apocalyptic number.

It is an amenable number.

28883665 is a deficient number, since it is larger than the sum of its proper divisors (5810903).

28883665 is a wasteful number, since it uses less digits than its factorization.

28883665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699.

The product of its digits is 552960, while the sum is 46.

The square root of 28883665 is about 5374.3525191413. The cubic root of 28883665 is about 306.8203067301.

The spelling of 28883665 in words is "twenty-eight million, eight hundred eighty-three thousand, six hundred sixty-five".