28235407 has 2 divisors, whose sum is σ = 28235408. Its totient is φ = 28235406.

The previous prime is 28235399. The next prime is 28235413. The reversal of 28235407 is 70453282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28235407 - 2³ = 28235399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28235437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14117703 + 14117704.

It is an arithmetic number, because the mean of its divisors is an integer number (14117704).

Almost surely, 2^28235407 is an apocalyptic number.

28235407 is a deficient number, since it is larger than the sum of its proper divisors (1).

28235407 is an equidigital number, since it uses as much as digits as its factorization.

28235407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28235407 is about 5313.6999350735. The cubic root of 28235407 is about 304.5075166011.

Adding to 28235407 its reverse (70453282), we get a palindrome (98688689).

The spelling of 28235407 in words is "twenty-eight million, two hundred thirty-five thousand, four hundred seven".