28451252 has 12 divisors (see below), whose sum is σ = 50124900. Its totient is φ = 14129856.

The previous prime is 28451243. The next prime is 28451257. The reversal of 28451252 is 25215482.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 26152996 = 1516^2 + 5114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451257) 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 3 ways as a sum of consecutive naturals, for example, 23273 + ... + 24464.

It is an arithmetic number, because the mean of its divisors is an integer number (4177075).

Almost surely, 2^28451252 is an apocalyptic number.

It is an amenable number.

28451252 is a deficient number, since it is larger than the sum of its proper divisors (21673648).

28451252 is a wasteful number, since it uses less digits than its factorization.

28451252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47890 (or 47888 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 28451252 is about 5333.9715034859. The cubic root of 28451252 is about 305.2814816107.

The spelling of 28451252 in words is "twenty-eight million, four hundred fifty-one thousand, two hundred fifty-two".