28533047 has 2 divisors, whose sum is σ = 28533048. Its totient is φ = 28533046.

The previous prime is 28533017. The next prime is 28533059. The reversal of 28533047 is 74033582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28533047 - 2¹⁸ = 28270903 is a prime.

It is a super-2 number, since 2×28533047² = 1628269542208418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28533017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14266523 + 14266524.

It is an arithmetic number, because the mean of its divisors is an integer number (14266524).

Almost surely, 2^28533047 is an apocalyptic number.

28533047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28533047 is an equidigital number, since it uses as much as digits as its factorization.

28533047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28533047 is about 5341.6333644308. The cubic root of 28533047 is about 305.5737547189.

The spelling of 28533047 in words is "twenty-eight million, five hundred thirty-three thousand, forty-seven".