542638 has 8 divisors (see below), whose sum is σ = 819000. Its totient is φ = 269640.

The previous prime is 542603. The next prime is 542683. The reversal of 542638 is 836245.

542638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 5⁵ + 4⁴ + 6⁵ + 2⁵ + 3¹² + 8 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388 + ... + 1111.

It is an arithmetic number, because the mean of its divisors is an integer number (102375).

2⁵⁴²⁶³⁸ is an apocalyptic number.

542638 is a deficient number, since it is larger than the sum of its proper divisors (276362).

542638 is a wasteful number, since it uses less digits than its factorization.

542638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682.

The product of its digits is 5760, while the sum is 28.

The square root of 542638 is about 736.6396676802. The cubic root of 542638 is about 81.5649174770.

The spelling of 542638 in words is "five hundred forty-two thousand, six hundred thirty-eight".