42686838 has 24 divisors (see below), whose sum is σ = 95914728. Its totient is φ = 14228784.

The previous prime is 42686837. The next prime is 42686843. The reversal of 42686838 is 83868624.

It is a happy number.

It is a super-3 number, since 3×42686838³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 42686793 and 42686802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42686837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43431 + ... + 44402.

It is an arithmetic number, because the mean of its divisors is an integer number (3996447).

Almost surely, 2^42686838 is an apocalyptic number.

42686838 is an abundant number, since it is smaller than the sum of its proper divisors (53227890).

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

42686838 is an equidigital number, since it uses as much as digits as its factorization.

42686838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87850 (or 87838 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 42686838 is about 6533.5165110375. The cubic root of 42686838 is about 349.4872437275.

The spelling of 42686838 in words is "forty-two million, six hundred eighty-six thousand, eight hundred thirty-eight".