387781696 has 56 divisors (see below), whose sum is σ = 822630816. Its totient is φ = 180725760.

The previous prime is 387781663. The next prime is 387781703. The reversal of 387781696 is 696187783.

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 7 ways as a sum of consecutive naturals, for example, 114751 + ... + 118081.

It is an arithmetic number, because the mean of its divisors is an integer number (14689836).

Almost surely, 2^387781696 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 387781696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411315408).

387781696 is an abundant number, since it is smaller than the sum of its proper divisors (434849120).

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

387781696 is a wasteful number, since it uses less digits than its factorization.

387781696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467 (or 3457 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 55.

The square root of 387781696 is about 19692.1734706964. The cubic root of 387781696 is about 729.2264878587.

The spelling of 387781696 in words is "three hundred eighty-seven million, seven hundred eighty-one thousand, six hundred ninety-six".