28501071 has 16 divisors (see below), whose sum is σ = 40331520. Its totient is φ = 17864000.

The previous prime is 28501051. The next prime is 28501087. The reversal of 28501071 is 17010582.

It is a cyclic number.

It is not a de Polignac number, because 28501071 - 2¹⁰ = 28500047 is a prime.

It is a super-2 number, since 2×28501071² = 1624622096294082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28501001) 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, 571 + ... + 7571.

It is an arithmetic number, because the mean of its divisors is an integer number (2520720).

Almost surely, 2^28501071 is an apocalyptic number.

28501071 is a deficient number, since it is larger than the sum of its proper divisors (11830449).

28501071 is a wasteful number, since it uses less digits than its factorization.

28501071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7086.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28501071 is about 5338.6394334137. The cubic root of 28501071 is about 305.4595634016.

The spelling of 28501071 in words is "twenty-eight million, five hundred one thousand, seventy-one".