28072433 has 2 divisors, whose sum is σ = 28072434. Its totient is φ = 28072432.

The previous prime is 28072417. The next prime is 28072439. The reversal of 28072433 is 33427082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 8958049 = 4372^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 28072433 - 2⁴ = 28072417 is a prime.

It is a super-2 number, since 2×28072433² = 1576122989078978, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28072396 and 28072405.

It is not a weakly prime, because it can be changed into another prime (28072439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036216 + 14036217.

It is an arithmetic number, because the mean of its divisors is an integer number (14036217).

Almost surely, 2^28072433 is an apocalyptic number.

It is an amenable number.

28072433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28072433 is an equidigital number, since it uses as much as digits as its factorization.

28072433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28072433 is about 5298.3424766619. The cubic root of 28072433 is about 303.9205160678.

The spelling of 28072433 in words is "twenty-eight million, seventy-two thousand, four hundred thirty-three".