388424447 has 4 divisors (see below), whose sum is σ = 397898256. Its totient is φ = 378950640.

The previous prime is 388424419. The next prime is 388424471. The reversal of 388424447 is 744424883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 388424447 - 2⁸ = 388424191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 388424398 and 388424407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388426447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4736843 + ... + 4736924.

It is an arithmetic number, because the mean of its divisors is an integer number (99474564).

Almost surely, 2^388424447 is an apocalyptic number.

388424447 is a deficient number, since it is larger than the sum of its proper divisors (9473809).

388424447 is an equidigital number, since it uses as much as digits as its factorization.

388424447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473808.

The product of its digits is 688128, while the sum is 44.

The square root of 388424447 is about 19708.4866745268. The cubic root of 388424447 is about 729.6291648746.

The spelling of 388424447 in words is "three hundred eighty-eight million, four hundred twenty-four thousand, four hundred forty-seven".