28880947 has 2 divisors, whose sum is σ = 28880948. Its totient is φ = 28880946.

The previous prime is 28880941. The next prime is 28880959. The reversal of 28880947 is 74908882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28880947 - 2¹⁵ = 28848179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28880897 and 28880906.

It is not a weakly prime, because it can be changed into another prime (28880941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440473 + 14440474.

It is an arithmetic number, because the mean of its divisors is an integer number (14440474).

Almost surely, 2^28880947 is an apocalyptic number.

28880947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28880947 is an equidigital number, since it uses as much as digits as its factorization.

28880947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 28880947 is about 5374.0996455220. The cubic root of 28880947 is about 306.8106823311.

The spelling of 28880947 in words is "twenty-eight million, eight hundred eighty thousand, nine hundred forty-seven".