28998990457 has 2 divisors, whose sum is σ = 28998990458. Its totient is φ = 28998990456.

The previous prime is 28998990437. The next prime is 28998990469. The reversal of 28998990457 is 75409989982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15211768896 + 13787221561 = 123336^2 + 117419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28998990457 is a prime.

It is not a weakly prime, because it can be changed into another prime (28998990437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14499495228 + 14499495229.

It is an arithmetic number, because the mean of its divisors is an integer number (14499495229).

Almost surely, 2^28998990457 is an apocalyptic number.

It is an amenable number.

28998990457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28998990457 is an equidigital number, since it uses as much as digits as its factorization.

28998990457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 70.

The spelling of 28998990457 in words is "twenty-eight billion, nine hundred ninety-eight million, nine hundred ninety thousand, four hundred fifty-seven".