388493649 has 12 divisors (see below), whose sum is σ = 566606976. Its totient is φ = 256480632.

The previous prime is 388493647. The next prime is 388493659. The reversal of 388493649 is 946394883.

It is a happy number.

It is not a de Polignac number, because 388493649 - 2¹ = 388493647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388493595 and 388493604.

It is not an unprimeable number, because it can be changed into a prime (388493641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208617 + ... + 210470.

It is an arithmetic number, because the mean of its divisors is an integer number (47217248).

Almost surely, 2^388493649 is an apocalyptic number.

It is an amenable number.

388493649 is a deficient number, since it is larger than the sum of its proper divisors (178113327).

388493649 is a wasteful number, since it uses less digits than its factorization.

388493649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419196 (or 419193 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 388493649 is about 19710.2422359544. The cubic root of 388493649 is about 729.6724927338.

The spelling of 388493649 in words is "three hundred eighty-eight million, four hundred ninety-three thousand, six hundred forty-nine".