385351778 has 24 divisors (see below), whose sum is σ = 686714112. Its totient is φ = 161634984.

The previous prime is 385351753. The next prime is 385351783. The reversal of 385351778 is 877153583.

It is a super-2 number, since 2×385351778² = 296991985615522568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37226 + ... + 46437.

It is an arithmetic number, because the mean of its divisors is an integer number (28613088).

Almost surely, 2^385351778 is an apocalyptic number.

385351778 is a deficient number, since it is larger than the sum of its proper divisors (301362334).

385351778 is a wasteful number, since it uses less digits than its factorization.

385351778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83726 (or 83719 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 385351778 is about 19630.3789571164. The cubic root of 385351778 is about 727.7001353779.

The spelling of 385351778 in words is "three hundred eighty-five million, three hundred fifty-one thousand, seven hundred seventy-eight".