385778136 has 64 divisors (see below), whose sum is σ = 1009336320. Its totient is φ = 122722560.

The previous prime is 385778123. The next prime is 385778137. The reversal of 385778136 is 631877583.

It is a super-3 number, since 3×385778136³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385778137) 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, 50761 + ... + 57863.

It is an arithmetic number, because the mean of its divisors is an integer number (15770880).

Almost surely, 2^385778136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385778136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504668160).

385778136 is an abundant number, since it is smaller than the sum of its proper divisors (623558184).

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

385778136 is a wasteful number, since it uses less digits than its factorization.

385778136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216 (or 7212 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 385778136 is about 19641.2356026804. The cubic root of 385778136 is about 727.9684152863.

The spelling of 385778136 in words is "three hundred eighty-five million, seven hundred seventy-eight thousand, one hundred thirty-six".