388344836477 has 4 divisors (see below), whose sum is σ = 418217516220. Its totient is φ = 358472156736.

The previous prime is 388344836471. The next prime is 388344836543. The reversal of 388344836477 is 774638443883.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19393069081 + 368951767396 = 139259^2 + 607414^2 .

It is a cyclic number.

It is not a de Polignac number, because 388344836477 - 2⁶ = 388344836413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388344836471) 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, 14936339852 + ... + 14936339877.

It is an arithmetic number, because the mean of its divisors is an integer number (104554379055).

Almost surely, 2^388344836477 is an apocalyptic number.

It is an amenable number.

388344836477 is a deficient number, since it is larger than the sum of its proper divisors (29872679743).

388344836477 is a wasteful number, since it uses less digits than its factorization.

388344836477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29872679742.

The product of its digits is 260112384, while the sum is 65.

The spelling of 388344836477 in words is "three hundred eighty-eight billion, three hundred forty-four million, eight hundred thirty-six thousand, four hundred seventy-seven".