28990144511 has 4 divisors (see below), whose sum is σ = 29020758072. Its totient is φ = 28959530952.

The previous prime is 28990144507. The next prime is 28990144609. The reversal of 28990144511 is 11544109982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28990144511 - 2² = 28990144507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28990144811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15305360 + ... + 15307253.

It is an arithmetic number, because the mean of its divisors is an integer number (7255189518).

Almost surely, 2^28990144511 is an apocalyptic number.

28990144511 is a deficient number, since it is larger than the sum of its proper divisors (30613561).

28990144511 is an equidigital number, since it uses as much as digits as its factorization.

28990144511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30613560.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 28990144511 in words is "twenty-eight billion, nine hundred ninety million, one hundred forty-four thousand, five hundred eleven".