387316644 has 216 divisors, whose sum is σ = 1152414144. Its totient is φ = 100531200.

The previous prime is 387316597. The next prime is 387316649. The reversal of 387316644 is 446613783.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 387316596 and 387316605.

It is not an unprimeable number, because it can be changed into a prime (387316649) 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 71 ways as a sum of consecutive naturals, for example, 5455129 + ... + 5455199.

Almost surely, 2^387316644 is an apocalyptic number.

387316644 is a gapful number since it is divisible by the number (34) 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 387316644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576207072).

387316644 is an abundant number, since it is smaller than the sum of its proper divisors (765097500).

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

387316644 is a wasteful number, since it uses less digits than its factorization.

387316644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 117 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 387316644 is about 19680.3618869166. The cubic root of 387316644 is about 728.9348599502.

The spelling of 387316644 in words is "three hundred eighty-seven million, three hundred sixteen thousand, six hundred forty-four".