42730844 has 12 divisors (see below), whose sum is σ = 80531304. Its totient is φ = 19721904.

The previous prime is 42730823. The next prime is 42730901. The reversal of 42730844 is 44803724.

It is a self number, because there is not a number n which added to its sum of digits gives 42730844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410822 + ... + 410925.

It is an arithmetic number, because the mean of its divisors is an integer number (6710942).

Almost surely, 2^42730844 is an apocalyptic number.

It is an amenable number.

42730844 is a deficient number, since it is larger than the sum of its proper divisors (37800460).

42730844 is a wasteful number, since it uses less digits than its factorization.

42730844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821764 (or 821762 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 42730844 is about 6536.8833552389. The cubic root of 42730844 is about 349.6072983271.

The spelling of 42730844 in words is "forty-two million, seven hundred thirty thousand, eight hundred forty-four".