42046840 has 32 divisors (see below), whose sum is σ = 103206960. Its totient is φ = 15289600.

The previous prime is 42046817. The next prime is 42046841. The reversal of 42046840 is 4864024.

It is a junction number, because it is equal to n+sod(n) for n = 42046799 and 42046808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42046841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 47341 + ... + 48220.

Almost surely, 2^42046840 is an apocalyptic number.

42046840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42046840 is an abundant number, since it is smaller than the sum of its proper divisors (61160120).

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

42046840 is a wasteful number, since it uses less digits than its factorization.

42046840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95583 (or 95579 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 42046840 is about 6484.3534758679. The cubic root of 42046840 is about 347.7318363925.

The spelling of 42046840 in words is "forty-two million, forty-six thousand, eight hundred forty".