28057232 has 40 divisors (see below), whose sum is σ = 64138752. Its totient is φ = 11635200.

The previous prime is 28057231. The next prime is 28057241. The reversal of 28057232 is 23275082.

It is a junction number, because it is equal to n+sod(n) for n = 28057195 and 28057204.

It is not an unprimeable number, because it can be changed into a prime (28057231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 7512.

Almost surely, 2^28057232 is an apocalyptic number.

It is an amenable number.

28057232 is an abundant number, since it is smaller than the sum of its proper divisors (36081520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28057232 is a wasteful number, since it uses less digits than its factorization.

28057232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127 (or 8121 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28057232 is about 5296.9077771847. The cubic root of 28057232 is about 303.8656493130.

The spelling of 28057232 in words is "twenty-eight million, fifty-seven thousand, two hundred thirty-two".