28457512 has 8 divisors (see below), whose sum is σ = 53357850. Its totient is φ = 14228752.

The previous prime is 28457501. The next prime is 28457531. The reversal of 28457512 is 21575482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19660356 + 8797156 = 4434^2 + 2966^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1778587 + ... + 1778602.

Almost surely, 2^28457512 is an apocalyptic number.

It is an amenable number.

28457512 is a deficient number, since it is larger than the sum of its proper divisors (24900338).

28457512 is a wasteful number, since it uses less digits than its factorization.

28457512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3557195 (or 3557191 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 28457512 is about 5334.5582759962. The cubic root of 28457512 is about 305.3038698690.

The spelling of 28457512 in words is "twenty-eight million, four hundred fifty-seven thousand, five hundred twelve".