388448773 has 2 divisors, whose sum is σ = 388448774. Its totient is φ = 388448772.

The previous prime is 388448747. The next prime is 388448783. The reversal of 388448773 is 377844883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282811489 + 105637284 = 16817^2 + 10278^2 .

It is a cyclic number.

It is not a de Polignac number, because 388448773 - 2²¹ = 386351621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388448773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388448783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194224386 + 194224387.

It is an arithmetic number, because the mean of its divisors is an integer number (194224387).

Almost surely, 2^388448773 is an apocalyptic number.

It is an amenable number.

388448773 is a deficient number, since it is larger than the sum of its proper divisors (1).

388448773 is an equidigital number, since it uses as much as digits as its factorization.

388448773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 52.

The square root of 388448773 is about 19709.1038101685. The cubic root of 388448773 is about 729.6443961409.

The spelling of 388448773 in words is "three hundred eighty-eight million, four hundred forty-eight thousand, seven hundred seventy-three".