28851771 has 16 divisors (see below), whose sum is σ = 43866144. Its totient is φ = 16710144.

The previous prime is 28851751. The next prime is 28851791. The reversal of 28851771 is 17715882.

It is an interprime number because it is at equal distance from previous prime (28851751) and next prime (28851791).

It is not a de Polignac number, because 28851771 - 2⁶ = 28851707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28851701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21096 + ... + 22421.

It is an arithmetic number, because the mean of its divisors is an integer number (2741634).

Almost surely, 2^28851771 is an apocalyptic number.

28851771 is a deficient number, since it is larger than the sum of its proper divisors (15014373).

28851771 is a wasteful number, since it uses less digits than its factorization.

28851771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43550.

The product of its digits is 31360, while the sum is 39.

The square root of 28851771 is about 5371.3844584055. The cubic root of 28851771 is about 306.7073324827.

It can be divided in two parts, 2885 and 1771, that added together give a triangular number (4656 = T₉₆).

The spelling of 28851771 in words is "twenty-eight million, eight hundred fifty-one thousand, seven hundred seventy-one".