388429668 has 144 divisors (see below), whose sum is σ = 1176686784. Its totient is φ = 110730240.

The previous prime is 388429637. The next prime is 388429687. The reversal of 388429668 is 866924883.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180696 + ... + 182832.

It is an arithmetic number, because the mean of its divisors is an integer number (8171436).

Almost surely, 2^388429668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388429668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588343392).

388429668 is an abundant number, since it is smaller than the sum of its proper divisors (788257116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388429668 is a wasteful number, since it uses less digits than its factorization.

388429668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2170 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 388429668 is about 19708.6191297107. The cubic root of 388429668 is about 729.6324339589.

The spelling of 388429668 in words is "three hundred eighty-eight million, four hundred twenty-nine thousand, six hundred sixty-eight".