542739686 has 16 divisors (see below), whose sum is σ = 819791280. Its totient is φ = 269482080.

The previous prime is 542739677. The next prime is 542739697. The reversal of 542739686 is 686937245.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233900 + ... + 236208.

It is an arithmetic number, because the mean of its divisors is an integer number (51236955).

Almost surely, 2^542739686 is an apocalyptic number.

542739686 is a deficient number, since it is larger than the sum of its proper divisors (277051594).

542739686 is a wasteful number, since it uses less digits than its factorization.

542739686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its digits is 2177280, while the sum is 50.

The square root of 542739686 is about 23296.7741543760. The cubic root of 542739686 is about 815.7001202881.

The spelling of 542739686 in words is "five hundred forty-two million, seven hundred thirty-nine thousand, six hundred eighty-six".