42398540 has 24 divisors (see below), whose sum is σ = 89159280. Its totient is φ = 16936128.

The previous prime is 42398539. The next prime is 42398567. The reversal of 42398540 is 4589324.

42398540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42398540.

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, 28331 + ... + 29789.

It is an arithmetic number, because the mean of its divisors is an integer number (3714970).

Almost surely, 2^42398540 is an apocalyptic number.

It is an amenable number.

42398540 is an abundant number, since it is smaller than the sum of its proper divisors (46760740).

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

42398540 is a wasteful number, since it uses less digits than its factorization.

42398540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 42398540 is about 6511.4161286160. The cubic root of 42398540 is about 348.6986778021.

The spelling of 42398540 in words is "forty-two million, three hundred ninety-eight thousand, five hundred forty".