42684858 has 24 divisors (see below), whose sum is σ = 97924788. Its totient is φ = 13391232.

The previous prime is 42684833. The next prime is 42684881. The reversal of 42684858 is 85848624.

42684858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40870449 + 1814409 = 6393^2 + 1347^2 .

It is a super-3 number, since 3×42684858³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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 11 ways as a sum of consecutive naturals, for example, 69441 + ... + 70052.

Almost surely, 2^42684858 is an apocalyptic number.

42684858 is an abundant number, since it is smaller than the sum of its proper divisors (55239930).

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

42684858 is a wasteful number, since it uses less digits than its factorization.

42684858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139518 (or 139515 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 42684858 is about 6533.3649829165. The cubic root of 42684858 is about 349.4818400678.

It can be divided in two parts, 4 and 2684858, that added together give a palindrome (2684862).

The spelling of 42684858 in words is "forty-two million, six hundred eighty-four thousand, eight hundred fifty-eight".