42867840 has 128 divisors (see below), whose sum is σ = 138801600. Its totient is φ = 11251712.

The previous prime is 42867827. The next prime is 42867841. The reversal of 42867840 is 4876824.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (42867841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159226 + ... + 159494.

Almost surely, 2^42867840 is an apocalyptic number.

42867840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42867840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69400800).

42867840 is an abundant number, since it is smaller than the sum of its proper divisors (95933760).

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

42867840 is a wasteful number, since it uses less digits than its factorization.

42867840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 42867840 is about 6547.3536638859. The cubic root of 42867840 is about 349.9805159222.

The spelling of 42867840 in words is "forty-two million, eight hundred sixty-seven thousand, eight hundred forty".