41991858 has 56 divisors (see below), whose sum is σ = 95851728. Its totient is φ = 13788792.

The previous prime is 41991857. The next prime is 41991869. The reversal of 41991858 is 85819914.

It is a super-2 number, since 2×41991858² = 3526632276584328, which contains 22 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 a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (41991857) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 120841 + ... + 121187.

It is an arithmetic number, because the mean of its divisors is an integer number (1711638).

Almost surely, 2^41991858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 41991858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47925864).

41991858 is an abundant number, since it is smaller than the sum of its proper divisors (53859870).

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

41991858 is an equidigital number, since it uses as much as digits as its factorization.

41991858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 435 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 41991858 is about 6480.1124990235. The cubic root of 41991858 is about 347.5802012839.

It can be divided in two parts, 41991 and 858, that added together give a square (42849 = 207²).

The spelling of 41991858 in words is "forty-one million, nine hundred ninety-one thousand, eight hundred fifty-eight".