28843641 has 16 divisors (see below), whose sum is σ = 42824320. Its totient is φ = 19187280.

The previous prime is 28843637. The next prime is 28843649. The reversal of 28843641 is 14634882.

28843641 is a `hidden beast` number, since 2 + 8 + 8 + 4 + 3 + 641 = 666.

It is not a de Polignac number, because 28843641 - 2² = 28843637 is a prime.

It is a super-2 number, since 2×28843641² = 1663911252273762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28843596 and 28843605.

It is not an unprimeable number, because it can be changed into a prime (28843649) 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, 16191 + ... + 17883.

It is an arithmetic number, because the mean of its divisors is an integer number (2676520).

Almost surely, 2^28843641 is an apocalyptic number.

It is an amenable number.

28843641 is a deficient number, since it is larger than the sum of its proper divisors (13980679).

28843641 is a wasteful number, since it uses less digits than its factorization.

28843641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333 (or 2327 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 28843641 is about 5370.6276169550. The cubic root of 28843641 is about 306.6785212546.

The spelling of 28843641 in words is "twenty-eight million, eight hundred forty-three thousand, six hundred forty-one".