28861449 has 8 divisors (see below), whose sum is σ = 38740800. Its totient is φ = 19111536.

The previous prime is 28861447. The next prime is 28861451. The reversal of 28861449 is 94416882.

It is an interprime number because it is at equal distance from previous prime (28861447) and next prime (28861451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28861449 - 2¹ = 28861447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28861449.

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 7 ways as a sum of consecutive naturals, for example, 31837 + ... + 32730.

It is an arithmetic number, because the mean of its divisors is an integer number (4842600).

Almost surely, 2^28861449 is an apocalyptic number.

It is an amenable number.

28861449 is a deficient number, since it is larger than the sum of its proper divisors (9879351).

28861449 is a wasteful number, since it uses less digits than its factorization.

28861449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64719.

The product of its digits is 110592, while the sum is 42.

The square root of 28861449 is about 5372.2852679284. The cubic root of 28861449 is about 306.7416224832.

It can be divided in two parts, 2886 and 1449, that multiplied together give a palindrome (4181814).

The spelling of 28861449 in words is "twenty-eight million, eight hundred sixty-one thousand, four hundred forty-nine".