385489669 has 8 divisors (see below), whose sum is σ = 390625560. Its totient is φ = 380384256.

The previous prime is 385489609. The next prime is 385489691. The reversal of 385489669 is 966984583.

It can be written as a sum of positive squares in 4 ways, for example, as 118592100 + 266897569 = 10890^2 + 16337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385489669 - 2⁷ = 385489541 is a prime.

It is a super-2 number, since 2×385489669² = 297204569811459122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385489609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18429 + ... + 33325.

It is an arithmetic number, because the mean of its divisors is an integer number (48828195).

Almost surely, 2^385489669 is an apocalyptic number.

It is an amenable number.

385489669 is a deficient number, since it is larger than the sum of its proper divisors (5135891).

385489669 is a wasteful number, since it uses less digits than its factorization.

385489669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15239.

The product of its digits is 11197440, while the sum is 58.

The square root of 385489669 is about 19633.8908268331. The cubic root of 385489669 is about 727.7869230343.

The spelling of 385489669 in words is "three hundred eighty-five million, four hundred eighty-nine thousand, six hundred sixty-nine".