42658638 has 32 divisors (see below), whose sum is σ = 93388032. Its totient is φ = 12883200.

The previous prime is 42658633. The next prime is 42658673. The reversal of 42658638 is 83685624.

It is a self number, because there is not a number n which added to its sum of digits gives 42658638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42658633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22383 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (2918376).

Almost surely, 2^42658638 is an apocalyptic number.

42658638 is an abundant number, since it is smaller than the sum of its proper divisors (50729394).

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

42658638 is a wasteful number, since it uses less digits than its factorization.

42658638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its digits is 276480, while the sum is 42.

The square root of 42658638 is about 6531.3580517378. The cubic root of 42658638 is about 349.4102667497.

It can be divided in two parts, 426586 and 38, that added together give a palindrome (426624).

The spelling of 42658638 in words is "forty-two million, six hundred fifty-eight thousand, six hundred thirty-eight".