387665944 has 16 divisors (see below), whose sum is σ = 727443720. Its totient is φ = 193680960.

The previous prime is 387665921. The next prime is 387665963. The reversal of 387665944 is 449566783.

It is a super-2 number, since 2×387665944² = 300569768274822272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 387665891 and 387665900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7774 + ... + 28909.

Almost surely, 2^387665944 is an apocalyptic number.

It is an amenable number.

387665944 is a deficient number, since it is larger than the sum of its proper divisors (339777776).

387665944 is a wasteful number, since it uses less digits than its factorization.

387665944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38010 (or 38006 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The square root of 387665944 is about 19689.2342156824. The cubic root of 387665944 is about 729.1539231268.

The spelling of 387665944 in words is "three hundred eighty-seven million, six hundred sixty-five thousand, nine hundred forty-four".