42838040 has 32 divisors (see below), whose sum is σ = 110155680. Its totient is φ = 14687232.

The previous prime is 42838031. The next prime is 42838051. The reversal of 42838040 is 4083824.

It is a junction number, because it is equal to n+sod(n) for n = 42837994 and 42838012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76217 + ... + 76776.

It is an arithmetic number, because the mean of its divisors is an integer number (3442365).

Almost surely, 2^42838040 is an apocalyptic number.

42838040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42838040 is an abundant number, since it is smaller than the sum of its proper divisors (67317640).

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

42838040 is a wasteful number, since it uses less digits than its factorization.

42838040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153011 (or 153007 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 42838040 is about 6545.0775396476. The cubic root of 42838040 is about 349.8993996587.

The spelling of 42838040 in words is "forty-two million, eight hundred thirty-eight thousand, forty".