28472571 has 6 divisors (see below), whose sum is σ = 41127060. Its totient is φ = 18981708.

The previous prime is 28472557. The next prime is 28472617. The reversal of 28472571 is 17527482.

28472571 is a `hidden beast` number, since 2 + 84 + 7 + 2 + 571 = 666.

It is not a de Polignac number, because 28472571 - 2¹⁴ = 28456187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28472371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1581801 + ... + 1581818.

It is an arithmetic number, because the mean of its divisors is an integer number (6854510).

Almost surely, 2^28472571 is an apocalyptic number.

28472571 is a deficient number, since it is larger than the sum of its proper divisors (12654489).

28472571 is a wasteful number, since it uses less digits than its factorization.

28472571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163625 (or 3163622 counting only the distinct ones).

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

The square root of 28472571 is about 5335.9695463899. The cubic root of 28472571 is about 305.3577134170.

The spelling of 28472571 in words is "twenty-eight million, four hundred seventy-two thousand, five hundred seventy-one".