388409742 has 112 divisors (see below), whose sum is σ = 1051378560. Its totient is φ = 105080976.

The previous prime is 388409737. The next prime is 388409743. The reversal of 388409742 is 247904883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388409743) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 192913 + ... + 194915.

Almost surely, 2^388409742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388409742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525689280).

388409742 is an abundant number, since it is smaller than the sum of its proper divisors (662968818).

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

388409742 is a wasteful number, since it uses less digits than its factorization.

388409742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 388409742 is about 19708.1136083594. The cubic root of 388409742 is about 729.6199573077.

The spelling of 388409742 in words is "three hundred eighty-eight million, four hundred nine thousand, seven hundred forty-two".