28571132 has 6 divisors (see below), whose sum is σ = 49999488. Its totient is φ = 14285564.

The previous prime is 28571131. The next prime is 28571143. The reversal of 28571132 is 23117582.

It is a super-2 number, since 2×28571132² = 1632619167522848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28571095 and 28571104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28571131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571388 + ... + 3571395.

It is an arithmetic number, because the mean of its divisors is an integer number (8333248).

Almost surely, 2^28571132 is an apocalyptic number.

It is an amenable number.

28571132 is a deficient number, since it is larger than the sum of its proper divisors (21428356).

28571132 is a wasteful number, since it uses less digits than its factorization.

28571132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142787 (or 7142785 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 28571132 is about 5345.1970964596. The cubic root of 28571132 is about 305.7096509702.

It can be divided in two parts, 285 and 71132, that added together give a palindrome (71417).

The spelling of 28571132 in words is "twenty-eight million, five hundred seventy-one thousand, one hundred thirty-two".