42255738 has 72 divisors (see below), whose sum is σ = 111185568. Its totient is φ = 11542608.

The previous prime is 42255701. The next prime is 42255749. The reversal of 42255738 is 83755224.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19245 + ... + 21327.

It is an arithmetic number, because the mean of its divisors is an integer number (1544244).

Almost surely, 2^42255738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42255738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55592784).

42255738 is an abundant number, since it is smaller than the sum of its proper divisors (68929830).

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

42255738 is a wasteful number, since it uses less digits than its factorization.

42255738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128 (or 2118 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 42255738 is about 6500.4413696302. The cubic root of 42255738 is about 348.3067548890.

The spelling of 42255738 in words is "forty-two million, two hundred fifty-five thousand, seven hundred thirty-eight".