388493449 has 4 divisors (see below), whose sum is σ = 389109760. Its totient is φ = 387877140.

The previous prime is 388493431. The next prime is 388493453. The reversal of 388493449 is 944394883.

It is a happy number.

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 388493449 - 2⁷ = 388493321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388493396 and 388493405.

It is not an unprimeable number, because it can be changed into a prime (388493849) 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, 307209 + ... + 308470.

It is an arithmetic number, because the mean of its divisors is an integer number (97277440).

Almost surely, 2^388493449 is an apocalyptic number.

It is an amenable number.

388493449 is a deficient number, since it is larger than the sum of its proper divisors (616311).

388493449 is an equidigital number, since it uses as much as digits as its factorization.

388493449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616310.

The product of its digits is 2985984, while the sum is 52.

The square root of 388493449 is about 19710.2371624494. The cubic root of 388493449 is about 729.6723675198.

The spelling of 388493449 in words is "three hundred eighty-eight million, four hundred ninety-three thousand, four hundred forty-nine".