28148571 has 24 divisors (see below), whose sum is σ = 44541120. Its totient is φ = 16988400.

The previous prime is 28148567. The next prime is 28148579. The reversal of 28148571 is 17584182.

28148571 is a `hidden beast` number, since 2 + 81 + 4 + 8 + 571 = 666.

It is not a de Polignac number, because 28148571 - 2² = 28148567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28148579) 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, 32340 + ... + 33198.

It is an arithmetic number, because the mean of its divisors is an integer number (1855880).

Almost surely, 2^28148571 is an apocalyptic number.

28148571 is a deficient number, since it is larger than the sum of its proper divisors (16392549).

28148571 is a wasteful number, since it uses less digits than its factorization.

28148571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1204 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 28148571 is about 5305.5226886707. The cubic root of 28148571 is about 304.1950322538.

The spelling of 28148571 in words is "twenty-eight million, one hundred forty-eight thousand, five hundred seventy-one".