28520941 has 2 divisors, whose sum is σ = 28520942. Its totient is φ = 28520940.

The previous prime is 28520939. The next prime is 28520959. The reversal of 28520941 is 14902582.

28520941 = T₄₃₅₉ + T₄₃₆₀ + T₄₃₆₁.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27562500 + 958441 = 5250^2 + 979^2 .

It is a cyclic number.

It is not a de Polignac number, because 28520941 - 2¹ = 28520939 is a prime.

Together with 28520939, it forms a pair of twin primes.

It is the 5341-st Hogben number.

It is equal to p_1771852 and since 28520941 and 1771852 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28520981) by changing a digit.

It is a nontrivial repunit in base 5340.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260470 + 14260471.

It is an arithmetic number, because the mean of its divisors is an integer number (14260471).

Almost surely, 2^28520941 is an apocalyptic number.

28520941 is the 4361-st centered triangular number.

It is an amenable number.

28520941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28520941 is an equidigital number, since it uses as much as digits as its factorization.

28520941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 28520941 is about 5340.5000702181. The cubic root of 28520941 is about 305.5305323322.

The spelling of 28520941 in words is "twenty-eight million, five hundred twenty thousand, nine hundred forty-one".