28683641 has 16 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 22571520.

The previous prime is 28683601. The next prime is 28683659. The reversal of 28683641 is 14638682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28683641 - 2¹⁰ = 28682617 is a prime.

It is a super-2 number, since 2×28683641² = 1645502522033762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28683595 and 28683604.

It is not an unprimeable number, because it can be changed into a prime (28683601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1940 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (2222640).

Almost surely, 2^28683641 is an apocalyptic number.

It is an amenable number.

28683641 is a deficient number, since it is larger than the sum of its proper divisors (6878599).

28683641 is a wasteful number, since it uses less digits than its factorization.

28683641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944.

The product of its digits is 55296, while the sum is 38.

The square root of 28683641 is about 5355.7110639018. The cubic root of 28683641 is about 306.1104055733.

The spelling of 28683641 in words is "twenty-eight million, six hundred eighty-three thousand, six hundred forty-one".