28707433 has 2 divisors, whose sum is σ = 28707434. Its totient is φ = 28707432.

The previous prime is 28707409. The next prime is 28707443. The reversal of 28707433 is 33470782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 6692569 = 4692^2 + 2587^2 .

It is a cyclic number.

It is not a de Polignac number, because 28707433 - 2⁵ = 28707401 is a prime.

It is a super-4 number, since 4×28707433⁴ (a number of 31 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (28707443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14353716 + 14353717.

It is an arithmetic number, because the mean of its divisors is an integer number (14353717).

Almost surely, 2^28707433 is an apocalyptic number.

It is an amenable number.

28707433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28707433 is an equidigital number, since it uses as much as digits as its factorization.

28707433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 28707433 is about 5357.9317838136. The cubic root of 28707433 is about 306.1950178679.

The spelling of 28707433 in words is "twenty-eight million, seven hundred seven thousand, four hundred thirty-three".