42640842 has 16 divisors (see below), whose sum is σ = 85473792. Its totient is φ = 14181600.

The previous prime is 42640837. The next prime is 42640849. The reversal of 42640842 is 24804624.

It is not an unprimeable number, because it can be changed into a prime (42640849) 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, 5034 + ... + 10517.

It is an arithmetic number, because the mean of its divisors is an integer number (5342112).

Almost surely, 2^42640842 is an apocalyptic number.

42640842 is an abundant number, since it is smaller than the sum of its proper divisors (42832950).

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

42640842 is a wasteful number, since it uses less digits than its factorization.

42640842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16013.

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 42640842 is about 6529.9955589571. The cubic root of 42640842 is about 349.3616719026.

The spelling of 42640842 in words is "forty-two million, six hundred forty thousand, eight hundred forty-two".