387964381 has 8 divisors (see below), whose sum is σ = 444263040. Its totient is φ = 331884528.

The previous prime is 387964337. The next prime is 387964433. The reversal of 387964381 is 183469783.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387964381 is a prime.

It is a super-2 number, since 2×387964381² = 301032721849426322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387964301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50881 + ... + 58006.

It is an arithmetic number, because the mean of its divisors is an integer number (55532880).

Almost surely, 2^387964381 is an apocalyptic number.

It is an amenable number.

387964381 is a deficient number, since it is larger than the sum of its proper divisors (56298659).

387964381 is a wasteful number, since it uses less digits than its factorization.

387964381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109403.

The product of its digits is 870912, while the sum is 49.

The square root of 387964381 is about 19696.8114424645. The cubic root of 387964381 is about 729.3409834008.

The spelling of 387964381 in words is "three hundred eighty-seven million, nine hundred sixty-four thousand, three hundred eighty-one".