28507516 has 12 divisors (see below), whose sum is σ = 50373232. Its totient is φ = 14115168.

The previous prime is 28507513. The next prime is 28507529. The reversal of 28507516 is 61570582.

It is a super-3 number, since 3×28507516³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28507513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34185 + ... + 35008.

Almost surely, 2^28507516 is an apocalyptic number.

It is an amenable number.

28507516 is a deficient number, since it is larger than the sum of its proper divisors (21865716).

28507516 is a wasteful number, since it uses less digits than its factorization.

28507516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69300 (or 69298 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 28507516 is about 5339.2430175073. The cubic root of 28507516 is about 305.4825863786.

The spelling of 28507516 in words is "twenty-eight million, five hundred seven thousand, five hundred sixteen".