388442620 has 12 divisors (see below), whose sum is σ = 815729544. Its totient is φ = 155377040.

The previous prime is 388442603. The next prime is 388442689. The reversal of 388442620 is 26244883.

It is a self number, because there is not a number n which added to its sum of digits gives 388442620.

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 3 ways as a sum of consecutive naturals, for example, 9711046 + ... + 9711085.

It is an arithmetic number, because the mean of its divisors is an integer number (67977462).

Almost surely, 2^388442620 is an apocalyptic number.

It is an amenable number.

388442620 is an abundant number, since it is smaller than the sum of its proper divisors (427286924).

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

388442620 is a wasteful number, since it uses less digits than its factorization.

388442620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19422140 (or 19422138 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 388442620 is about 19708.9477141729. The cubic root of 388442620 is about 729.6405436160.

The spelling of 388442620 in words is "three hundred eighty-eight million, four hundred forty-two thousand, six hundred twenty".