28920422537 has 2 divisors, whose sum is σ = 28920422538. Its totient is φ = 28920422536.

The previous prime is 28920422513. The next prime is 28920422543. The reversal of 28920422537 is 73522402982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27856945216 + 1063477321 = 166904^2 + 32611^2 .

It is a cyclic number.

It is not a de Polignac number, because 28920422537 - 2⁸ = 28920422281 is a prime.

It is not a weakly prime, because it can be changed into another prime (28920422737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14460211268 + 14460211269.

It is an arithmetic number, because the mean of its divisors is an integer number (14460211269).

Almost surely, 2^28920422537 is an apocalyptic number.

It is an amenable number.

28920422537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28920422537 is an equidigital number, since it uses as much as digits as its factorization.

28920422537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 28920422537 in words is "twenty-eight billion, nine hundred twenty million, four hundred twenty-two thousand, five hundred thirty-seven".