385729828 has 12 divisors (see below), whose sum is σ = 736393392. Its totient is φ = 175331720.

The previous prime is 385729793. The next prime is 385729829. The reversal of 385729828 is 828927583.

It is not an unprimeable number, because it can be changed into a prime (385729829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4383250 + ... + 4383337.

It is an arithmetic number, because the mean of its divisors is an integer number (61366116).

Almost surely, 2^385729828 is an apocalyptic number.

It is an amenable number.

385729828 is a deficient number, since it is larger than the sum of its proper divisors (350663564).

385729828 is a wasteful number, since it uses less digits than its factorization.

385729828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8766602 (or 8766600 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 385729828 is about 19640.0058044798. The cubic root of 385729828 is about 727.9380280741.

It can be divided in two parts, 38572 and 9828, that added together give a square (48400 = 220²).

The spelling of 385729828 in words is "three hundred eighty-five million, seven hundred twenty-nine thousand, eight hundred twenty-eight".