28428107 has 2 divisors, whose sum is σ = 28428108. Its totient is φ = 28428106.

The previous prime is 28428073. The next prime is 28428109. The reversal of 28428107 is 70182482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28428107 - 2¹⁰ = 28427083 is a prime.

Together with 28428109, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28428109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14214053 + 14214054.

It is an arithmetic number, because the mean of its divisors is an integer number (14214054).

Almost surely, 2^28428107 is an apocalyptic number.

28428107 is a deficient number, since it is larger than the sum of its proper divisors (1).

28428107 is an equidigital number, since it uses as much as digits as its factorization.

28428107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28428107 is about 5331.8014779247. The cubic root of 28428107 is about 305.1986773256.

The spelling of 28428107 in words is "twenty-eight million, four hundred twenty-eight thousand, one hundred seven".