387856836 has 120 divisors (see below), whose sum is σ = 1090637856. Its totient is φ = 119750400.

The previous prime is 387856813. The next prime is 387856837. The reversal of 387856836 is 638658783.

It is a happy number.

387856836 is a `hidden beast` number, since 3 + 8 + 78 + 568 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (387856837) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 368511 + ... + 369561.

Almost surely, 2^387856836 is an apocalyptic number.

387856836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387856836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545318928).

387856836 is an abundant number, since it is smaller than the sum of its proper divisors (702781020).

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

387856836 is a wasteful number, since it uses less digits than its factorization.

387856836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1140 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 387856836 is about 19694.0812428506. The cubic root of 387856836 is about 729.2735852678.

The spelling of 387856836 in words is "three hundred eighty-seven million, eight hundred fifty-six thousand, eight hundred thirty-six".