388145522 has 6 divisors (see below), whose sum is σ = 582260079. Its totient is φ = 194058830.

The previous prime is 388145519. The next prime is 388145531. The reversal of 388145522 is 225541883.

It can be written as a sum of positive squares in only one way, i.e., 194072761 + 194072761 = 13931^2 + 13931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=13931.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20897 + ... + 34827.

Almost surely, 2^388145522 is an apocalyptic number.

388145522 is a deficient number, since it is larger than the sum of its proper divisors (194114557).

388145522 is an frugal number, since it uses more digits than its factorization.

388145522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27864 (or 13933 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 388145522 is about 19701.4091374196. The cubic root of 388145522 is about 729.4544757776.

The spelling of 388145522 in words is "three hundred eighty-eight million, one hundred forty-five thousand, five hundred twenty-two".