42446540 has 12 divisors (see below), whose sum is σ = 89137776. Its totient is φ = 16978608.

The previous prime is 42446531. The next prime is 42446543. The reversal of 42446540 is 4564424.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42446543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061144 + ... + 1061183.

It is an arithmetic number, because the mean of its divisors is an integer number (7428148).

Almost surely, 2^42446540 is an apocalyptic number.

It is an amenable number.

42446540 is an abundant number, since it is smaller than the sum of its proper divisors (46691236).

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

42446540 is a wasteful number, since it uses less digits than its factorization.

42446540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122336 (or 2122334 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 42446540 is about 6515.1009201700. The cubic root of 42446540 is about 348.8302171132.

It can be divided in two parts, 424 and 46540, that added together give a palindrome (46964).

The spelling of 42446540 in words is "forty-two million, four hundred forty-six thousand, five hundred forty".