42739986 has 8 divisors (see below), whose sum is σ = 85479984. Its totient is φ = 14246660.

The previous prime is 42739969. The next prime is 42740017. The reversal of 42739986 is 68993724.

It is a sphenic number, since it is the product of 3 distinct primes.

42739986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561660 + ... + 3561671.

It is an arithmetic number, because the mean of its divisors is an integer number (10684998).

Almost surely, 2^42739986 is an apocalyptic number.

42739986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42739986 is a wasteful number, since it uses less digits than its factorization.

42739986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123336.

The product of its digits is 653184, while the sum is 48.

The square root of 42739986 is about 6537.5825807404. The cubic root of 42739986 is about 349.6322286563.

The spelling of 42739986 in words is "forty-two million, seven hundred thirty-nine thousand, nine hundred eighty-six".