42158340 has 192 divisors, whose sum is σ = 158054400. Its totient is φ = 9113472.

The previous prime is 42158329. The next prime is 42158353. The reversal of 42158340 is 4385124.

42158340 is a `hidden beast` number, since 42 + 1 + 583 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71527 + ... + 72113.

It is an arithmetic number, because the mean of its divisors is an integer number (823200).

Almost surely, 2^42158340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42158340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79027200).

42158340 is an abundant number, since it is smaller than the sum of its proper divisors (115896060).

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

42158340 is a wasteful number, since it uses less digits than its factorization.

42158340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 42158340 is about 6492.9454025119. The cubic root of 42158340 is about 348.0389373792.

The spelling of 42158340 in words is "forty-two million, one hundred fifty-eight thousand, three hundred forty".