42931746 has 72 divisors (see below), whose sum is σ = 109966896. Its totient is φ = 11999520.

The previous prime is 42931723. The next prime is 42931747. The reversal of 42931746 is 64713924.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42931746.

It is not an unprimeable number, because it can be changed into a prime (42931747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32821 + ... + 34103.

It is an arithmetic number, because the mean of its divisors is an integer number (1527318).

Almost surely, 2^42931746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42931746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54983448).

42931746 is an abundant number, since it is smaller than the sum of its proper divisors (67035150).

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

42931746 is a wasteful number, since it uses less digits than its factorization.

42931746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328 (or 1312 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 42931746 is about 6552.2321387448. The cubic root of 42931746 is about 350.1543428123.

The spelling of 42931746 in words is "forty-two million, nine hundred thirty-one thousand, seven hundred forty-six".