388336877 has 4 divisors (see below), whose sum is σ = 408775680. Its totient is φ = 367898076.

The previous prime is 388336873. The next prime is 388336939. The reversal of 388336877 is 778633883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388336877 - 2² = 388336873 is a prime.

It is a super-2 number, since 2×388336877² = 301611060076226258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388336873) 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, 10219373 + ... + 10219410.

It is an arithmetic number, because the mean of its divisors is an integer number (102193920).

Almost surely, 2^388336877 is an apocalyptic number.

It is an amenable number.

388336877 is a deficient number, since it is larger than the sum of its proper divisors (20438803).

388336877 is a wasteful number, since it uses less digits than its factorization.

388336877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20438802.

The product of its digits is 4064256, while the sum is 53.

The square root of 388336877 is about 19706.2649175332. The cubic root of 388336877 is about 729.5743293044.

The spelling of 388336877 in words is "three hundred eighty-eight million, three hundred thirty-six thousand, eight hundred seventy-seven".