388788449 has 4 divisors (see below), whose sum is σ = 444329664. Its totient is φ = 333247236.

The previous prime is 388788427. The next prime is 388788451. The reversal of 388788449 is 944887883.

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 not a de Polignac number, because 388788449 - 2²⁰ = 387739873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388788149) 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, 27770597 + ... + 27770610.

It is an arithmetic number, because the mean of its divisors is an integer number (111082416).

Almost surely, 2^388788449 is an apocalyptic number.

It is an amenable number.

388788449 is a deficient number, since it is larger than the sum of its proper divisors (55541215).

388788449 is an equidigital number, since it uses as much as digits as its factorization.

388788449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55541214.

The product of its digits is 12386304, while the sum is 59.

The square root of 388788449 is about 19717.7191632298. The cubic root of 388788449 is about 729.8570114636.

The spelling of 388788449 in words is "three hundred eighty-eight million, seven hundred eighty-eight thousand, four hundred forty-nine".