28035881 has 2 divisors, whose sum is σ = 28035882. Its totient is φ = 28035880.

The previous prime is 28035877. The next prime is 28035893. The reversal of 28035881 is 18853082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17505856 + 10530025 = 4184^2 + 3245^2 .

It is a cyclic number.

It is not a de Polignac number, because 28035881 - 2² = 28035877 is a prime.

It is a super-2 number, since 2×28035881² = 1572021246892322, which contains 22 as substring.

It is equal to p_1743578 and since 28035881 and 1743578 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28035851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14017940 + 14017941.

It is an arithmetic number, because the mean of its divisors is an integer number (14017941).

Almost surely, 2^28035881 is an apocalyptic number.

It is an amenable number.

28035881 is a deficient number, since it is larger than the sum of its proper divisors (1).

28035881 is an equidigital number, since it uses as much as digits as its factorization.

28035881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 28035881 is about 5294.8919724580. The cubic root of 28035881 is about 303.7885511649.

The spelling of 28035881 in words is "twenty-eight million, thirty-five thousand, eight hundred eighty-one".