42399140 has 24 divisors (see below), whose sum is σ = 101758272. Its totient is φ = 14536800.

The previous prime is 42399113. The next prime is 42399157. The reversal of 42399140 is 4199324.

It is a happy number.

42399140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42399097 and 42399106.

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, 151286 + ... + 151565.

It is an arithmetic number, because the mean of its divisors is an integer number (4239928).

Almost surely, 2^42399140 is an apocalyptic number.

It is an amenable number.

42399140 is an abundant number, since it is smaller than the sum of its proper divisors (59359132).

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

42399140 is a wasteful number, since it uses less digits than its factorization.

42399140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302867 (or 302865 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 42399140 is about 6511.4622013800. The cubic root of 42399140 is about 348.7003226561.

The spelling of 42399140 in words is "forty-two million, three hundred ninety-nine thousand, one hundred forty".