42804639 has 32 divisors (see below), whose sum is σ = 65664000. Its totient is φ = 27542592.

The previous prime is 42804631. The next prime is 42804653. The reversal of 42804639 is 93640824.

It is a happy number.

It is not a de Polignac number, because 42804639 - 2³ = 42804631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42804631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112752 + ... + 113130.

It is an arithmetic number, because the mean of its divisors is an integer number (2052000).

Almost surely, 2^42804639 is an apocalyptic number.

42804639 is a deficient number, since it is larger than the sum of its proper divisors (22859361).

42804639 is a wasteful number, since it uses less digits than its factorization.

42804639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 518 counting only the distinct ones).

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

The square root of 42804639 is about 6542.5254298321. The cubic root of 42804639 is about 349.8084366686.

The spelling of 42804639 in words is "forty-two million, eight hundred four thousand, six hundred thirty-nine".