388380777 has 4 divisors (see below), whose sum is σ = 517841040. Its totient is φ = 258920516.

The previous prime is 388380763. The next prime is 388380833. The reversal of 388380777 is 777083883.

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 388380777 - 2¹⁴ = 388364393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388380077) 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, 64730127 + ... + 64730132.

It is an arithmetic number, because the mean of its divisors is an integer number (129460260).

Almost surely, 2^388380777 is an apocalyptic number.

It is an amenable number.

388380777 is a deficient number, since it is larger than the sum of its proper divisors (129460263).

388380777 is a wasteful number, since it uses less digits than its factorization.

388380777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129460262.

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 388380777 is about 19707.3787450285. The cubic root of 388380777 is about 729.6018201318.

The spelling of 388380777 in words is "three hundred eighty-eight million, three hundred eighty thousand, seven hundred seventy-seven".