42839770 has 16 divisors (see below), whose sum is σ = 77205960. Its totient is φ = 17114944.

The previous prime is 42839729. The next prime is 42839773. The reversal of 42839770 is 7793824.

It can be written as a sum of positive squares in 4 ways, for example, as 33977241 + 8862529 = 5829^2 + 2977^2 .

It is not an unprimeable number, because it can be changed into a prime (42839773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8016 + ... + 12244.

Almost surely, 2^42839770 is an apocalyptic number.

42839770 is a deficient number, since it is larger than the sum of its proper divisors (34366190).

42839770 is a wasteful number, since it uses less digits than its factorization.

42839770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 42839770 is about 6545.2096987033. The cubic root of 42839770 is about 349.9041097856.

The spelling of 42839770 in words is "forty-two million, eight hundred thirty-nine thousand, seven hundred seventy".