28157032 has 16 divisors (see below), whose sum is σ = 55900260. Its totient is φ = 13250304.

The previous prime is 28157027. The next prime is 28157053. The reversal of 28157032 is 23075182.

It can be written as a sum of positive squares in 2 ways, for example, as 26977636 + 1179396 = 5194^2 + 1086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103383 + ... + 103654.

Almost surely, 2^28157032 is an apocalyptic number.

It is an amenable number.

28157032 is a deficient number, since it is larger than the sum of its proper divisors (27743228).

28157032 is a wasteful number, since it uses less digits than its factorization.

28157032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207060 (or 207056 counting only the distinct ones).

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

The square root of 28157032 is about 5306.3200054275. The cubic root of 28157032 is about 304.2255078841.

The spelling of 28157032 in words is "twenty-eight million, one hundred fifty-seven thousand, thirty-two".