42440730 has 32 divisors (see below), whose sum is σ = 102384000. Its totient is φ = 11259072.

The previous prime is 42440719. The next prime is 42440743. The reversal of 42440730 is 3704424.

It is a self number, because there is not a number n which added to its sum of digits gives 42440730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416 + ... + 9524.

It is an arithmetic number, because the mean of its divisors is an integer number (3199500).

Almost surely, 2^42440730 is an apocalyptic number.

42440730 is an abundant number, since it is smaller than the sum of its proper divisors (59943270).

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

42440730 is a wasteful number, since it uses less digits than its factorization.

42440730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7318.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 42440730 is about 6514.6550177273. The cubic root of 42440730 is about 348.8143006527.

The spelling of 42440730 in words is "forty-two million, four hundred forty thousand, seven hundred thirty".