387921020834 has 8 divisors (see below), whose sum is σ = 581884247340. Its totient is φ = 193959605056.

The previous prime is 387921020813. The next prime is 387921020867. The reversal of 387921020834 is 438020129783.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 315503519809 + 72417501025 = 561697^2 + 269105^2 .

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

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, 417302 + ... + 974670.

Almost surely, 2^387921020834 is an apocalyptic number.

387921020834 is a deficient number, since it is larger than the sum of its proper divisors (193963226506).

387921020834 is a wasteful number, since it uses less digits than its factorization.

387921020834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905364.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 387921020834 in words is "three hundred eighty-seven billion, nine hundred twenty-one million, twenty thousand, eight hundred thirty-four".