28920833 has 2 divisors, whose sum is σ = 28920834. Its totient is φ = 28920832.

The previous prime is 28920809. The next prime is 28920863. The reversal of 28920833 is 33802982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17032129 + 11888704 = 4127^2 + 3448^2 .

It is a cyclic number.

It is not a de Polignac number, because 28920833 - 2¹² = 28916737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28920793 and 28920802.

It is not a weakly prime, because it can be changed into another prime (28920803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14460416 + 14460417.

It is an arithmetic number, because the mean of its divisors is an integer number (14460417).

Almost surely, 2^28920833 is an apocalyptic number.

It is an amenable number.

28920833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28920833 is an equidigital number, since it uses as much as digits as its factorization.

28920833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28920833 is about 5377.8093123502. The cubic root of 28920833 is about 306.9518575458.

The spelling of 28920833 in words is "twenty-eight million, nine hundred twenty thousand, eight hundred thirty-three".