28905841 has 2 divisors, whose sum is σ = 28905842. Its totient is φ = 28905840.

The previous prime is 28905757. The next prime is 28905853. The reversal of 28905841 is 14850982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15178816 + 13727025 = 3896^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 28905841 - 2⁷ = 28905713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28905841.

It is not a weakly prime, because it can be changed into another prime (28905241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14452920 + 14452921.

It is an arithmetic number, because the mean of its divisors is an integer number (14452921).

Almost surely, 2^28905841 is an apocalyptic number.

It is an amenable number.

28905841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28905841 is an equidigital number, since it uses as much as digits as its factorization.

28905841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28905841 is about 5376.4152555397. The cubic root of 28905841 is about 306.8988090779.

The spelling of 28905841 in words is "twenty-eight million, nine hundred five thousand, eight hundred forty-one".