42822639 has 6 divisors (see below), whose sum is σ = 61854936. Its totient is φ = 28548420.

The previous prime is 42822629. The next prime is 42822667. The reversal of 42822639 is 93622824.

42822639 is a `hidden beast` number, since 428 + 226 + 3 + 9 = 666.

It is not a de Polignac number, because 42822639 - 2⁷ = 42822511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42822629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2379027 + ... + 2379044.

It is an arithmetic number, because the mean of its divisors is an integer number (10309156).

Almost surely, 2^42822639 is an apocalyptic number.

42822639 is a deficient number, since it is larger than the sum of its proper divisors (19032297).

42822639 is a wasteful number, since it uses less digits than its factorization.

42822639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4758077 (or 4758074 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 42822639 is about 6543.9009008389. The cubic root of 42822639 is about 349.8574630484.

The spelling of 42822639 in words is "forty-two million, eight hundred twenty-two thousand, six hundred thirty-nine".