542626638 has 16 divisors (see below), whose sum is σ = 1149091920. Its totient is φ = 170235776.

The previous prime is 542626613. The next prime is 542626661. The reversal of 542626638 is 836626245.

It is a happy number.

542626638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×542626638³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 542626638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659833 + ... + 2660036.

It is an arithmetic number, because the mean of its divisors is an integer number (71818245).

Almost surely, 2^542626638 is an apocalyptic number.

542626638 is an abundant number, since it is smaller than the sum of its proper divisors (606465282).

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

542626638 is a wasteful number, since it uses less digits than its factorization.

542626638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5319891.

The product of its digits is 414720, while the sum is 42.

The square root of 542626638 is about 23294.3477693624. The cubic root of 542626638 is about 815.6434819200.

The spelling of 542626638 in words is "five hundred forty-two million, six hundred twenty-six thousand, six hundred thirty-eight".