42639558 has 16 divisors (see below), whose sum is σ = 91839216. Its totient is φ = 13119840.

The previous prime is 42639529. The next prime is 42639559. The reversal of 42639558 is 85593624.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42639559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273253 + ... + 273408.

It is an arithmetic number, because the mean of its divisors is an integer number (5739951).

Almost surely, 2^42639558 is an apocalyptic number.

42639558 is an abundant number, since it is smaller than the sum of its proper divisors (49199658).

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

42639558 is a wasteful number, since it uses less digits than its factorization.

42639558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546679.

The product of its digits is 259200, while the sum is 42.

The square root of 42639558 is about 6529.8972426831. The cubic root of 42639558 is about 349.3581652106.

The spelling of 42639558 in words is "forty-two million, six hundred thirty-nine thousand, five hundred fifty-eight".