28855901 has 2 divisors, whose sum is σ = 28855902. Its totient is φ = 28855900.

The previous prime is 28855877. The next prime is 28855907. The reversal of 28855901 is 10955882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25999801 + 2856100 = 5099^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 28855901 - 2⁶ = 28855837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28855907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14427950 + 14427951.

It is an arithmetic number, because the mean of its divisors is an integer number (14427951).

Almost surely, 2^28855901 is an apocalyptic number.

It is an amenable number.

28855901 is a deficient number, since it is larger than the sum of its proper divisors (1).

28855901 is an equidigital number, since it uses as much as digits as its factorization.

28855901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 28855901 is about 5371.7688892952. The cubic root of 28855901 is about 306.7219663717.

The spelling of 28855901 in words is "twenty-eight million, eight hundred fifty-five thousand, nine hundred one".