28590139 has 2 divisors, whose sum is σ = 28590140. Its totient is φ = 28590138.

The previous prime is 28590103. The next prime is 28590181. The reversal of 28590139 is 93109582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28590139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28590098 and 28590107.

It is not a weakly prime, because it can be changed into another prime (28590239) 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, 14295069 + 14295070.

It is an arithmetic number, because the mean of its divisors is an integer number (14295070).

Almost surely, 2^28590139 is an apocalyptic number.

28590139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28590139 is an equidigital number, since it uses as much as digits as its factorization.

28590139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 28590139 is about 5346.9747521379. The cubic root of 28590139 is about 305.7774272522. Note that the first 3 decimals are identical.

The spelling of 28590139 in words is "twenty-eight million, five hundred ninety thousand, one hundred thirty-nine".