28775641 has 8 divisors (see below), whose sum is σ = 29136800. Its totient is φ = 28416960.

The previous prime is 28775597. The next prime is 28775653. The reversal of 28775641 is 14657782.

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 28775641 - 2⁹ = 28775129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28775594 and 28775603.

It is not an unprimeable number, because it can be changed into a prime (28775141) 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, 33070 + ... + 33928.

It is an arithmetic number, because the mean of its divisors is an integer number (3642100).

Almost surely, 2^28775641 is an apocalyptic number.

It is an amenable number.

28775641 is a deficient number, since it is larger than the sum of its proper divisors (361159).

28775641 is a wasteful number, since it uses less digits than its factorization.

28775641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 94080, while the sum is 40.

The square root of 28775641 is about 5364.2931500804. The cubic root of 28775641 is about 306.4373294544.

The spelling of 28775641 in words is "twenty-eight million, seven hundred seventy-five thousand, six hundred forty-one".