42887840 has 24 divisors (see below), whose sum is σ = 101322900. Its totient is φ = 17155072.

The previous prime is 42887827. The next prime is 42887851. The reversal of 42887840 is 4878824.

It can be written as a sum of positive squares in 2 ways, for example, as 37994896 + 4892944 = 6164^2 + 2212^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133865 + ... + 134184.

Almost surely, 2^42887840 is an apocalyptic number.

42887840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42887840 is an abundant number, since it is smaller than the sum of its proper divisors (58435060).

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

42887840 is a wasteful number, since it uses less digits than its factorization.

42887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268064 (or 268056 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 41.

The square root of 42887840 is about 6548.8808204150. The cubic root of 42887840 is about 350.0349352883.

The spelling of 42887840 in words is "forty-two million, eight hundred eighty-seven thousand, eight hundred forty".