28906433 has 2 divisors, whose sum is σ = 28906434. Its totient is φ = 28906432.

The previous prime is 28906421. The next prime is 28906463. The reversal of 28906433 is 33460982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24275329 + 4631104 = 4927^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 28906433 - 2⁸ = 28906177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28906393 and 28906402.

It is not a weakly prime, because it can be changed into another prime (28906403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453216 + 14453217.

It is an arithmetic number, because the mean of its divisors is an integer number (14453217).

Almost surely, 2^28906433 is an apocalyptic number.

It is an amenable number.

28906433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28906433 is an equidigital number, since it uses as much as digits as its factorization.

28906433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28906433 is about 5376.4703105290. The cubic root of 28906433 is about 306.9009041892.

The spelling of 28906433 in words is "twenty-eight million, nine hundred six thousand, four hundred thirty-three".