28207512 has 48 divisors (see below), whose sum is σ = 77093640. Its totient is φ = 9316608.

The previous prime is 28207511. The next prime is 28207541. The reversal of 28207512 is 21570282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6403 + ... + 9869.

Almost surely, 2^28207512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28207512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38546820).

28207512 is an abundant number, since it is smaller than the sum of its proper divisors (48886128).

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

28207512 is a wasteful number, since it uses less digits than its factorization.

28207512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3585 counting only the distinct ones).

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

The square root of 28207512 is about 5311.0744675630. The cubic root of 28207512 is about 304.4072047717.

Adding to 28207512 its reverse (21570282), we get a palindrome (49777794).

The spelling of 28207512 in words is "twenty-eight million, two hundred seven thousand, five hundred twelve".