542402638 has 4 divisors (see below), whose sum is σ = 813603960. Its totient is φ = 271201318.

The previous prime is 542402621. The next prime is 542402669. The reversal of 542402638 is 836204245.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135600658 + ... + 135600661.

It is an arithmetic number, because the mean of its divisors is an integer number (203400990).

Almost surely, 2^542402638 is an apocalyptic number.

542402638 is a deficient number, since it is larger than the sum of its proper divisors (271201322).

542402638 is a wasteful number, since it uses less digits than its factorization.

542402638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271201321.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 542402638 is about 23289.5392397531. The cubic root of 542402638 is about 815.5312320638.

The spelling of 542402638 in words is "five hundred forty-two million, four hundred two thousand, six hundred thirty-eight".