28522071 has 8 divisors (see below), whose sum is σ = 42254960. Its totient is φ = 19014696.

The previous prime is 28522069. The next prime is 28522099. The reversal of 28522071 is 17022582.

It is not a de Polignac number, because 28522071 - 2¹ = 28522069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1056373 = 28522071 / (2 + 8 + 5 + 2 + 2 + 0 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532071) 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, 528160 + ... + 528213.

It is an arithmetic number, because the mean of its divisors is an integer number (5281870).

Almost surely, 2^28522071 is an apocalyptic number.

28522071 is a deficient number, since it is larger than the sum of its proper divisors (13732889).

28522071 is a wasteful number, since it uses less digits than its factorization.

28522071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056382 (or 1056376 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28522071 is about 5340.6058645064. The cubic root of 28522071 is about 305.5345673199.

The spelling of 28522071 in words is "twenty-eight million, five hundred twenty-two thousand, seventy-one".