387984447 has 24 divisors (see below), whose sum is σ = 586875744. Its totient is φ = 246527424.

The previous prime is 387984439. The next prime is 387984449. The reversal of 387984447 is 744489783.

It is not a de Polignac number, because 387984447 - 2³ = 387984439 is a prime.

It is a super-2 number, since 2×387984447² = 301063862227791618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 387984393 and 387984402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387984449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57453 + ... + 63849.

It is an arithmetic number, because the mean of its divisors is an integer number (24453156).

Almost surely, 2^387984447 is an apocalyptic number.

387984447 is a deficient number, since it is larger than the sum of its proper divisors (198891297).

387984447 is a wasteful number, since it uses less digits than its factorization.

387984447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719 (or 6716 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 387984447 is about 19697.3208076632. The cubic root of 387984447 is about 729.3535573248.

The spelling of 387984447 in words is "three hundred eighty-seven million, nine hundred eighty-four thousand, four hundred forty-seven".