28501512 has 48 divisors (see below), whose sum is σ = 77167440. Its totient is φ = 8768448.

The previous prime is 28501511. The next prime is 28501523. The reversal of 28501512 is 21510582.

It is a super-2 number, since 2×28501512² = 1624672372572288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (28501511) 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 11 ways as a sum of consecutive naturals, for example, 543 + ... + 7569.

It is an arithmetic number, because the mean of its divisors is an integer number (1607655).

Almost surely, 2^28501512 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 28501512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38583720).

28501512 is an abundant number, since it is smaller than the sum of its proper divisors (48665928).

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

28501512 is a wasteful number, since it uses less digits than its factorization.

28501512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062 (or 7045 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 28501512 is about 5338.6807359122. The cubic root of 28501512 is about 305.4611388625.

The spelling of 28501512 in words is "twenty-eight million, five hundred one thousand, five hundred twelve".