42818540 has 24 divisors (see below), whose sum is σ = 92011920. Its totient is φ = 16728768.

The previous prime is 42818521. The next prime is 42818543. The reversal of 42818540 is 4581824.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42818497 and 42818506.

It is not an unprimeable number, because it can be changed into a prime (42818543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24035 + ... + 25754.

It is an arithmetic number, because the mean of its divisors is an integer number (3833830).

Almost surely, 2^42818540 is an apocalyptic number.

It is an amenable number.

42818540 is an abundant number, since it is smaller than the sum of its proper divisors (49193380).

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

42818540 is a wasteful number, since it uses less digits than its factorization.

42818540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49841 (or 49839 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 42818540 is about 6543.5877009482. The cubic root of 42818540 is about 349.8462998604.

It can be divided in two parts, 4281 and 8540, that added together give a palindrome (12821).

The spelling of 42818540 in words is "forty-two million, eight hundred eighteen thousand, five hundred forty".