42381870 has 64 divisors (see below), whose sum is σ = 106997760. Its totient is φ = 10723328.

The previous prime is 42381869. The next prime is 42381877. The reversal of 42381870 is 7818324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42381877) 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, 164782 + ... + 165038.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^42381870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42381870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53498880).

42381870 is an abundant number, since it is smaller than the sum of its proper divisors (64615890).

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

42381870 is a wasteful number, since it uses less digits than its factorization.

42381870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 42381870 is about 6510.1359432811. The cubic root of 42381870 is about 348.6529720699.

The spelling of 42381870 in words is "forty-two million, three hundred eighty-one thousand, eight hundred seventy".