28990144507 has 2 divisors, whose sum is σ = 28990144508. Its totient is φ = 28990144506.

The previous prime is 28990144487. The next prime is 28990144609. The reversal of 28990144507 is 70544109982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28990144507 - 2²⁷ = 28855926779 is a prime.

It is not a weakly prime, because it can be changed into another prime (28990154507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14495072253 + 14495072254.

It is an arithmetic number, because the mean of its divisors is an integer number (14495072254).

Almost surely, 2^28990144507 is an apocalyptic number.

28990144507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28990144507 is an equidigital number, since it uses as much as digits as its factorization.

28990144507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 28990144507 in words is "twenty-eight billion, nine hundred ninety million, one hundred forty-four thousand, five hundred seven".