385211778 has 64 divisors (see below), whose sum is σ = 902430720. Its totient is φ = 107352000.

The previous prime is 385211741. The next prime is 385211779. The reversal of 385211778 is 877112583.

It is a super-2 number, since 2×385211778² = 296776227819842568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (385211779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300543 + ... + 301821.

It is an arithmetic number, because the mean of its divisors is an integer number (14100480).

Almost surely, 2^385211778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385211778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451215360).

385211778 is an abundant number, since it is smaller than the sum of its proper divisors (517218942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385211778 is a wasteful number, since it uses less digits than its factorization.

385211778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its digits is 94080, while the sum is 42.

The square root of 385211778 is about 19626.8127315670. The cubic root of 385211778 is about 727.6119991477.

The spelling of 385211778 in words is "three hundred eighty-five million, two hundred eleven thousand, seven hundred seventy-eight".