28861528 has 8 divisors (see below), whose sum is σ = 54115380. Its totient is φ = 14430760.

The previous prime is 28861489. The next prime is 28861537. The reversal of 28861528 is 82516882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1803838 + ... + 1803853.

Almost surely, 2^28861528 is an apocalyptic number.

It is an amenable number.

28861528 is a deficient number, since it is larger than the sum of its proper divisors (25253852).

28861528 is a wasteful number, since it uses less digits than its factorization.

28861528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607697 (or 3607693 counting only the distinct ones).

The product of its digits is 61440, while the sum is 40.

The square root of 28861528 is about 5372.2926204741. The cubic root of 28861528 is about 306.7419023556.

It can be divided in two parts, 288 and 61528, that added together give a palindrome (61816).

The spelling of 28861528 in words is "twenty-eight million, eight hundred sixty-one thousand, five hundred twenty-eight".