42807844 has 6 divisors (see below), whose sum is σ = 74913734. Its totient is φ = 21403920.

The previous prime is 42807829. The next prime is 42807847. The reversal of 42807844 is 44870824.

It can be written as a sum of positive squares in only one way, i.e., 36457444 + 6350400 = 6038^2 + 2520^2 .

It is not an unprimeable number, because it can be changed into a prime (42807847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5350977 + ... + 5350984.

Almost surely, 2^42807844 is an apocalyptic number.

It is an amenable number.

42807844 is a deficient number, since it is larger than the sum of its proper divisors (32105890).

42807844 is a wasteful number, since it uses less digits than its factorization.

42807844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10701965 (or 10701963 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 42807844 is about 6542.7703612461. The cubic root of 42807844 is about 349.8171670935.

The spelling of 42807844 in words is "forty-two million, eight hundred seven thousand, eight hundred forty-four".