28207152 has 30 divisors (see below), whose sum is σ = 78941252. Its totient is φ = 9402336.

The previous prime is 28207141. The next prime is 28207159. The reversal of 28207152 is 25170282.

It is a super-2 number, since 2×28207152² = 1591286847902208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28207159) 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 5 ways as a sum of consecutive naturals, for example, 97798 + ... + 98085.

Almost surely, 2^28207152 is an apocalyptic number.

It is an amenable number.

28207152 is an abundant number, since it is smaller than the sum of its proper divisors (50734100).

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

28207152 is a wasteful number, since it uses less digits than its factorization.

28207152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195897 (or 195888 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28207152 is about 5311.0405760077. The cubic root of 28207152 is about 304.4059097613.

The spelling of 28207152 in words is "twenty-eight million, two hundred seven thousand, one hundred fifty-two".