28542771 has 12 divisors (see below), whose sum is σ = 42106272. Its totient is φ = 18623376.

The previous prime is 28542763. The next prime is 28542791. The reversal of 28542771 is 17724582.

It is not a de Polignac number, because 28542771 - 2³ = 28542763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28542791) 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, 33316 + ... + 34161.

It is an arithmetic number, because the mean of its divisors is an integer number (3508856).

Almost surely, 2^28542771 is an apocalyptic number.

28542771 is a deficient number, since it is larger than the sum of its proper divisors (13563501).

28542771 is a wasteful number, since it uses less digits than its factorization.

28542771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67530 (or 67527 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 28542771 is about 5342.5434953775. The cubic root of 28542771 is about 305.6084637320.

It can be divided in two parts, 2854 and 2771, that added together give a square (5625 = 75²).

The spelling of 28542771 in words is "twenty-eight million, five hundred forty-two thousand, seven hundred seventy-one".