28756534 has 12 divisors (see below), whose sum is σ = 43801884. Its totient is φ = 14159244.

The previous prime is 28756531. The next prime is 28756549. The reversal of 28756534 is 43565782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28756531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7377 + ... + 10579.

It is an arithmetic number, because the mean of its divisors is an integer number (3650157).

Almost surely, 2^28756534 is an apocalyptic number.

28756534 is a deficient number, since it is larger than the sum of its proper divisors (15045350).

28756534 is an equidigital number, since it uses as much as digits as its factorization.

28756534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339 (or 3272 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 28756534 is about 5362.5119114087. The cubic root of 28756534 is about 306.3694897324.

It can be divided in two parts, 2875 and 6534, that added together give a square (9409 = 97²).

The spelling of 28756534 in words is "twenty-eight million, seven hundred fifty-six thousand, five hundred thirty-four".