28057132 has 6 divisors (see below), whose sum is σ = 49099988. Its totient is φ = 14028564.

The previous prime is 28057067. The next prime is 28057151. The reversal of 28057132 is 23175082.

It is a self number, because there is not a number n which added to its sum of digits gives 28057132.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3507138 + ... + 3507145.

Almost surely, 2^28057132 is an apocalyptic number.

It is an amenable number.

28057132 is a deficient number, since it is larger than the sum of its proper divisors (21042856).

28057132 is a wasteful number, since it uses less digits than its factorization.

28057132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014287 (or 7014285 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28057132 is about 5296.8983377067. The cubic root of 28057132 is about 303.8652883056.

The spelling of 28057132 in words is "twenty-eight million, fifty-seven thousand, one hundred thirty-two".