42812040 has 64 divisors (see below), whose sum is σ = 129159360. Its totient is φ = 11352320.

The previous prime is 42812027. The next prime is 42812041. The reversal of 42812040 is 4021824.

It is a junction number, because it is equal to n+sod(n) for n = 42811998 and 42812016.

It is not an unprimeable number, because it can be changed into a prime (42812041) 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, 22735 + ... + 24545.

It is an arithmetic number, because the mean of its divisors is an integer number (2018115).

Almost surely, 2^42812040 is an apocalyptic number.

42812040 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 42812040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64579680).

42812040 is an abundant number, since it is smaller than the sum of its proper divisors (86347320).

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

42812040 is a wasteful number, since it uses less digits than its factorization.

42812040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 42812040 is about 6543.0910126637. The cubic root of 42812040 is about 349.8285963452.

Adding to 42812040 its reverse (4021824), we get a palindrome (46833864).

The spelling of 42812040 in words is "forty-two million, eight hundred twelve thousand, forty".