42891858 has 12 divisors (see below), whose sum is σ = 92932398. Its totient is φ = 14297280.

The previous prime is 42891853. The next prime is 42891883. The reversal of 42891858 is 85819824.

It is a happy number.

42891858 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 only one way, i.e., 32798529 + 10093329 = 5727^2 + 3177^2 .

It is a super-2 number, since 2×42891858² = 3679422965384328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42891853) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1191423 + ... + 1191458.

Almost surely, 2^42891858 is an apocalyptic number.

42891858 is an abundant number, since it is smaller than the sum of its proper divisors (50040540).

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

42891858 is a wasteful number, since it uses less digits than its factorization.

42891858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382889 (or 2382886 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 42891858 is about 6549.1875832045. The cubic root of 42891858 is about 350.0458660980.

The spelling of 42891858 in words is "forty-two million, eight hundred ninety-one thousand, eight hundred fifty-eight".