28861441 has 12 divisors (see below), whose sum is σ = 33784128. Its totient is φ = 24583272.

The previous prime is 28861439. The next prime is 28861447. The reversal of 28861441 is 14416882.

It is not a de Polignac number, because 28861441 - 2¹ = 28861439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28861397 and 28861406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6420 + ... + 9946.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^28861441 is an apocalyptic number.

It is an amenable number.

28861441 is a deficient number, since it is larger than the sum of its proper divisors (4922687).

28861441 is a wasteful number, since it uses less digits than its factorization.

28861441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708 (or 3701 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 28861441 is about 5372.2845233662. The cubic root of 28861441 is about 306.7415941417.

The spelling of 28861441 in words is "twenty-eight million, eight hundred sixty-one thousand, four hundred forty-one".