42749924 has 48 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 17172000.

The previous prime is 42749923. The next prime is 42749947. The reversal of 42749924 is 42994724.

42749924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (42749923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56549 + ... + 57299.

It is an arithmetic number, because the mean of its divisors is an integer number (1895040).

Almost surely, 2^42749924 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 42749924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45480960).

42749924 is an abundant number, since it is smaller than the sum of its proper divisors (48211996).

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

42749924 is a wasteful number, since it uses less digits than its factorization.

42749924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 886 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 42749924 is about 6538.3426034432. The cubic root of 42749924 is about 349.6593256533.

The spelling of 42749924 in words is "forty-two million, seven hundred forty-nine thousand, nine hundred twenty-four".