385885889 has 2 divisors, whose sum is σ = 385885890. Its totient is φ = 385885888.

The previous prime is 385885879. The next prime is 385885931. The reversal of 385885889 is 988588583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295255489 + 90630400 = 17183^2 + 9520^2 .

It is a cyclic number.

It is not a de Polignac number, because 385885889 - 2²⁴ = 369108673 is a prime.

It is not a weakly prime, because it can be changed into another prime (385885879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192942944 + 192942945.

It is an arithmetic number, because the mean of its divisors is an integer number (192942945).

Almost surely, 2^385885889 is an apocalyptic number.

It is an amenable number.

385885889 is a deficient number, since it is larger than the sum of its proper divisors (1).

385885889 is an equidigital number, since it uses as much as digits as its factorization.

385885889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22118400, while the sum is 62.

The square root of 385885889 is about 19643.9784412425. The cubic root of 385885889 is about 728.0361860862.

The spelling of 385885889 in words is "three hundred eighty-five million, eight hundred eighty-five thousand, eight hundred eighty-nine".