42840494 has 8 divisors (see below), whose sum is σ = 64388520. Its totient is φ = 21377656.

The previous prime is 42840491. The next prime is 42840517. The reversal of 42840494 is 49404824.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42840491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20024 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (8048565).

Almost surely, 2^42840494 is an apocalyptic number.

42840494 is a deficient number, since it is larger than the sum of its proper divisors (21548026).

42840494 is a wasteful number, since it uses less digits than its factorization.

42840494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42594.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 42840494 is about 6545.2650060941. The cubic root of 42840494 is about 349.9060809224.

It can be divided in two parts, 42840 and 494, that added together give a palindrome (43334).

The spelling of 42840494 in words is "forty-two million, eight hundred forty thousand, four hundred ninety-four".