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28642829 is a prime number
BaseRepresentation
bin110110101000…
…0111000001101
31222220012120112
41231100320031
524313032304
62501525405
7465313535
oct155207015
958805515
1028642829
1115193866
129713865
135c1b327
143b384c5
1527abb6e
hex1b50e0d

28642829 has 2 divisors, whose sum is σ = 28642830. Its totient is φ = 28642828.

The previous prime is 28642819. The next prime is 28642837. The reversal of 28642829 is 92824682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26677225 + 1965604 = 5165^2 + 1402^2 .

It is a cyclic number.

It is not a de Polignac number, because 28642829 - 28 = 28642573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28642819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14321414 + 14321415.

It is an arithmetic number, because the mean of its divisors is an integer number (14321415).

Almost surely, 228642829 is an apocalyptic number.

It is an amenable number.

28642829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28642829 is an equidigital number, since it uses as much as digits as its factorization.

28642829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 41.

The square root of 28642829 is about 5351.8995693118. The cubic root of 28642829 is about 305.9651554440.

The spelling of 28642829 in words is "twenty-eight million, six hundred forty-two thousand, eight hundred twenty-nine".