28980137 has 2 divisors, whose sum is σ = 28980138. Its totient is φ = 28980136.

The previous prime is 28980131. The next prime is 28980163. The reversal of 28980137 is 73108982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28847641 + 132496 = 5371^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980137 - 2¹⁰ = 28979113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28980137.

It is not a weakly prime, because it can be changed into another prime (28980131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14490068 + 14490069.

It is an arithmetic number, because the mean of its divisors is an integer number (14490069).

Almost surely, 2^28980137 is an apocalyptic number.

It is an amenable number.

28980137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980137 is an equidigital number, since it uses as much as digits as its factorization.

28980137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28980137 is about 5383.3202579821. The cubic root of 28980137 is about 307.1615223765.

The spelling of 28980137 in words is "twenty-eight million, nine hundred eighty thousand, one hundred thirty-seven".