42709720 has 32 divisors (see below), whose sum is σ = 101156400. Its totient is φ = 16184448.

The previous prime is 42709717. The next prime is 42709747. The reversal of 42709720 is 2790724.

It is a happy number.

42709720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27339 + ... + 28858.

Almost surely, 2^42709720 is an apocalyptic number.

42709720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42709720 is an abundant number, since it is smaller than the sum of its proper divisors (58446680).

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

42709720 is a wasteful number, since it uses less digits than its factorization.

42709720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56227 (or 56223 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 42709720 is about 6535.2674008031. The cubic root of 42709720 is about 349.5496793557.

The spelling of 42709720 in words is "forty-two million, seven hundred nine thousand, seven hundred twenty".