85838389 has 16 divisors (see below), whose sum is σ = 111863808. Its totient is φ = 63919872.

The previous prime is 85838383. The next prime is 85838413. The reversal of 85838389 is 98383858.

It is a cyclic number.

It is not a de Polignac number, because 85838389 - 2³ = 85838381 is a prime.

It is a super-2 number, since 2×85838389² = 14736458052230642, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85838381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26197 + ... + 29290.

It is an arithmetic number, because the mean of its divisors is an integer number (6991488).

Almost surely, 2^85838389 is an apocalyptic number.

It is an amenable number.

85838389 is a deficient number, since it is larger than the sum of its proper divisors (26025419).

85838389 is a wasteful number, since it uses less digits than its factorization.

85838389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55524.

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

The square root of 85838389 is about 9264.9009169014. The cubic root of 85838389 is about 441.1238299395.

The spelling of 85838389 in words is "eighty-five million, eight hundred thirty-eight thousand, three hundred eighty-nine".