6388542 has 36 divisors (see below), whose sum is σ = 14423136. Its totient is φ = 2041560.

The previous prime is 6388523. The next prime is 6388559. The reversal of 6388542 is 2458836.

It is a junction number, because it is equal to n+sod(n) for n = 6388497 and 6388506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 59653 + ... + 59759.

Almost surely, 2^6388542 is an apocalyptic number.

6388542 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6388542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7211568).

6388542 is an abundant number, since it is smaller than the sum of its proper divisors (8034594).

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

6388542 is a wasteful number, since it uses less digits than its factorization.

6388542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 143 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 6388542 is about 2527.5565275578. The cubic root of 6388542 is about 185.5526885638.

It can be divided in two parts, 638 and 8542, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 6388542 in words is "six million, three hundred eighty-eight thousand, five hundred forty-two".