385621820387 has 4 divisors (see below), whose sum is σ = 385625498736. Its totient is φ = 385618142040.

The previous prime is 385621820371. The next prime is 385621820411. The reversal of 385621820387 is 783028126583.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 385621820387 - 2⁴ = 385621820371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385621820327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1677164 + ... + 1893177.

It is an arithmetic number, because the mean of its divisors is an integer number (96406374684).

Almost surely, 2^385621820387 is an apocalyptic number.

385621820387 is a deficient number, since it is larger than the sum of its proper divisors (3678349).

385621820387 is a wasteful number, since it uses less digits than its factorization.

385621820387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678348.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 385621820387 in words is "three hundred eighty-five billion, six hundred twenty-one million, eight hundred twenty thousand, three hundred eighty-seven".