28838014421 has 2 divisors, whose sum is σ = 28838014422. Its totient is φ = 28838014420.

The previous prime is 28838014411. The next prime is 28838014459. The reversal of 28838014421 is 12441083882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28531939396 + 306075025 = 168914^2 + 17495^2 .

It is a cyclic number.

It is not a de Polignac number, because 28838014421 - 2¹⁸ = 28837752277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28838014411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14419007210 + 14419007211.

It is an arithmetic number, because the mean of its divisors is an integer number (14419007211).

Almost surely, 2^28838014421 is an apocalyptic number.

It is an amenable number.

28838014421 is a deficient number, since it is larger than the sum of its proper divisors (1).

28838014421 is an equidigital number, since it uses as much as digits as its factorization.

28838014421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 28838014421 in words is "twenty-eight billion, eight hundred thirty-eight million, fourteen thousand, four hundred twenty-one".