28051607 has 2 divisors, whose sum is σ = 28051608. Its totient is φ = 28051606.

The previous prime is 28051601. The next prime is 28051691. The reversal of 28051607 is 70615082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28051607 - 2¹⁴ = 28035223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28051607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28051601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14025803 + 14025804.

It is an arithmetic number, because the mean of its divisors is an integer number (14025804).

Almost surely, 2^28051607 is an apocalyptic number.

28051607 is a deficient number, since it is larger than the sum of its proper divisors (1).

28051607 is an equidigital number, since it uses as much as digits as its factorization.

28051607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 28051607 is about 5296.3767804038. The cubic root of 28051607 is about 303.8453413164.

Adding to 28051607 its reverse (70615082), we get a palindrome (98666689).

The spelling of 28051607 in words is "twenty-eight million, fifty-one thousand, six hundred seven".