384739640 has 16 divisors (see below), whose sum is σ = 865664280. Its totient is φ = 153895840.

The previous prime is 384739637. The next prime is 384739643. The reversal of 384739640 is 46937483.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (384739637) and next prime (384739643).

It is a junction number, because it is equal to n+sod(n) for n = 384739591 and 384739600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384739643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4809206 + ... + 4809285.

Almost surely, 2^384739640 is an apocalyptic number.

It is an amenable number.

384739640 is an abundant number, since it is smaller than the sum of its proper divisors (480924640).

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

384739640 is a wasteful number, since it uses less digits than its factorization.

384739640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9618502 (or 9618498 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 384739640 is about 19614.7811611550. The cubic root of 384739640 is about 727.3146097282.

The spelling of 384739640 in words is "three hundred eighty-four million, seven hundred thirty-nine thousand, six hundred forty".