387639617 has 8 divisors (see below), whose sum is σ = 395649600. Its totient is φ = 379677744.

The previous prime is 387639613. The next prime is 387639641. The reversal of 387639617 is 716936783.

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

It is not a de Polignac number, because 387639617 - 2² = 387639613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387639613) 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, 4484 + ... + 28202.

It is an arithmetic number, because the mean of its divisors is an integer number (49456200).

Almost surely, 2^387639617 is an apocalyptic number.

It is an amenable number.

387639617 is a deficient number, since it is larger than the sum of its proper divisors (8009983).

387639617 is a wasteful number, since it uses less digits than its factorization.

387639617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24055.

The product of its digits is 1143072, while the sum is 50.

The square root of 387639617 is about 19688.5656410009. The cubic root of 387639617 is about 729.1374167590.

The spelling of 387639617 in words is "three hundred eighty-seven million, six hundred thirty-nine thousand, six hundred seventeen".