387445216 has 12 divisors (see below), whose sum is σ = 762782832. Its totient is φ = 193722592.

The previous prime is 387445183. The next prime is 387445217. The reversal of 387445216 is 612544783.

It is a super-2 number, since 2×387445216² = 300227590802573312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387445217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6053800 + ... + 6053863.

It is an arithmetic number, because the mean of its divisors is an integer number (63565236).

Almost surely, 2^387445216 is an apocalyptic number.

It is an amenable number.

387445216 is a deficient number, since it is larger than the sum of its proper divisors (375337616).

387445216 is a wasteful number, since it uses less digits than its factorization.

387445216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12107673 (or 12107665 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 387445216 is about 19683.6281208521. The cubic root of 387445216 is about 729.0155090744.

Adding to 387445216 its reverse (612544783), we get a palindrome (999989999).

The spelling of 387445216 in words is "three hundred eighty-seven million, four hundred forty-five thousand, two hundred sixteen".