28609132 has 6 divisors (see below), whose sum is σ = 50065988. Its totient is φ = 14304564.

The previous prime is 28609129. The next prime is 28609151. The reversal of 28609132 is 23190682.

It is a junction number, because it is equal to n+sod(n) for n = 28609094 and 28609103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576138 + ... + 3576145.

Almost surely, 2^28609132 is an apocalyptic number.

It is an amenable number.

28609132 is a deficient number, since it is larger than the sum of its proper divisors (21456856).

28609132 is a wasteful number, since it uses less digits than its factorization.

28609132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7152287 (or 7152285 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 28609132 is about 5348.7505082963. The cubic root of 28609132 is about 305.8451236132.

The spelling of 28609132 in words is "twenty-eight million, six hundred nine thousand, one hundred thirty-two".