42331590 has 144 divisors (see below), whose sum is σ = 132846480. Its totient is φ = 9313920.

The previous prime is 42331579. The next prime is 42331591. The reversal of 42331590 is 9513324.

42331590 is a `hidden beast` number, since 42 + 3 + 31 + 590 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42331591) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 127725 + ... + 128055.

It is an arithmetic number, because the mean of its divisors is an integer number (922545).

Almost surely, 2^42331590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42331590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66423240).

42331590 is an abundant number, since it is smaller than the sum of its proper divisors (90514890).

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

42331590 is a wasteful number, since it uses less digits than its factorization.

42331590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 42331590 is about 6506.2731267601. The cubic root of 42331590 is about 348.5150419567.

The spelling of 42331590 in words is "forty-two million, three hundred thirty-one thousand, five hundred ninety".