542122668 has 144 divisors (see below), whose sum is σ = 1531479040. Its totient is φ = 160963200.

The previous prime is 542122667. The next prime is 542122709. The reversal of 542122668 is 866221245.

It is a happy number.

542122668 is a `hidden beast` number, since 5 + 421 + 226 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (542122667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 784203 + ... + 784893.

Almost surely, 2^542122668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 542122668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (765739520).

542122668 is an abundant number, since it is smaller than the sum of its proper divisors (989356372).

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

542122668 is a wasteful number, since it uses less digits than its factorization.

542122668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 783 counting only the distinct ones).

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

The square root of 542122668 is about 23283.5278254821. The cubic root of 542122668 is about 815.3908913164.

The spelling of 542122668 in words is "five hundred forty-two million, one hundred twenty-two thousand, six hundred sixty-eight".