28240052 has 6 divisors (see below), whose sum is σ = 49420098. Its totient is φ = 14120024.

The previous prime is 28240049. The next prime is 28240057. The reversal of 28240052 is 25004282.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 12208036 = 4004^2 + 3494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28240057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3530003 + ... + 3530010.

It is an arithmetic number, because the mean of its divisors is an integer number (8236683).

Almost surely, 2^28240052 is an apocalyptic number.

It is an amenable number.

28240052 is a deficient number, since it is larger than the sum of its proper divisors (21180046).

28240052 is a wasteful number, since it uses less digits than its factorization.

28240052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060017 (or 7060015 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 28240052 is about 5314.1369948469. The cubic root of 28240052 is about 304.5242138382.

The spelling of 28240052 in words is "twenty-eight million, two hundred forty thousand, fifty-two".