28861443 has 48 divisors (see below), whose sum is σ = 47305440. Its totient is φ = 16837632.

The previous prime is 28861439. The next prime is 28861447. The reversal of 28861443 is 34416882.

It is an interprime number because it is at equal distance from previous prime (28861439) and next prime (28861447).

It is not a de Polignac number, because 28861443 - 2² = 28861439 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28861398 and 28861407.

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 47 ways as a sum of consecutive naturals, for example, 255355 + ... + 255467.

It is an arithmetic number, because the mean of its divisors is an integer number (985530).

Almost surely, 2^28861443 is an apocalyptic number.

28861443 is a deficient number, since it is larger than the sum of its proper divisors (18443997).

28861443 is a wasteful number, since it uses less digits than its factorization.

28861443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 225 counting only the distinct ones).

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

The square root of 28861443 is about 5372.2847095067. The cubic root of 28861443 is about 306.7416012271.

The spelling of 28861443 in words is "twenty-eight million, eight hundred sixty-one thousand, four hundred forty-three".