28982605381 has 2 divisors, whose sum is σ = 28982605382. Its totient is φ = 28982605380.

The previous prime is 28982605373. The next prime is 28982605391. The reversal of 28982605381 is 18350628982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20524860225 + 8457745156 = 143265^2 + 91966^2 .

It is a cyclic number.

It is not a de Polignac number, because 28982605381 - 2³ = 28982605373 is a prime.

It is a super-2 number, since 2×28982605381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28982605331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14491302690 + 14491302691.

It is an arithmetic number, because the mean of its divisors is an integer number (14491302691).

Almost surely, 2^28982605381 is an apocalyptic number.

It is an amenable number.

28982605381 is a deficient number, since it is larger than the sum of its proper divisors (1).

28982605381 is an equidigital number, since it uses as much as digits as its factorization.

28982605381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 28982605381 in words is "twenty-eight billion, nine hundred eighty-two million, six hundred five thousand, three hundred eighty-one".