42518840 has 64 divisors (see below), whose sum is σ = 117754560. Its totient is φ = 13455360.

The previous prime is 42518837. The next prime is 42518869. The reversal of 42518840 is 4881524.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42518797 and 42518806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2201 + ... + 9480.

It is an arithmetic number, because the mean of its divisors is an integer number (1839915).

Almost surely, 2^42518840 is an apocalyptic number.

42518840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42518840 is an abundant number, since it is smaller than the sum of its proper divisors (75235720).

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

42518840 is a wasteful number, since it uses less digits than its factorization.

42518840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11712 (or 11708 counting only the distinct ones).

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

The square root of 42518840 is about 6520.6472071413. The cubic root of 42518840 is about 349.0281611526.

The spelling of 42518840 in words is "forty-two million, five hundred eighteen thousand, eight hundred forty".