28571361 has 24 divisors (see below), whose sum is σ = 47726784. Its totient is φ = 15069600.

The previous prime is 28571353. The next prime is 28571369. The reversal of 28571361 is 16317582.

It is an interprime number because it is at equal distance from previous prime (28571353) and next prime (28571369).

It is not a de Polignac number, because 28571361 - 2³ = 28571353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28571369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5565 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (1988616).

Almost surely, 2^28571361 is an apocalyptic number.

28571361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28571361 is a deficient number, since it is larger than the sum of its proper divisors (19155423).

28571361 is a wasteful number, since it uses less digits than its factorization.

28571361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14981 (or 14974 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 28571361 is about 5345.2185175164. The cubic root of 28571361 is about 305.7104677307.

The spelling of 28571361 in words is "twenty-eight million, five hundred seventy-one thousand, three hundred sixty-one".