42744020 has 48 divisors (see below), whose sum is σ = 98981568. Its totient is φ = 15375360.

The previous prime is 42744019. The next prime is 42744049. The reversal of 42744020 is 2044724.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20339 + ... + 22341.

It is an arithmetic number, because the mean of its divisors is an integer number (2062116).

Almost surely, 2^42744020 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 42744020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49490784).

42744020 is an abundant number, since it is smaller than the sum of its proper divisors (56237548).

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

42744020 is a wasteful number, since it uses less digits than its factorization.

42744020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 42744020 is about 6537.8910972882. The cubic root of 42744020 is about 349.6432282859.

Adding to 42744020 its reverse (2044724), we get a palindrome (44788744).

The spelling of 42744020 in words is "forty-two million, seven hundred forty-four thousand, twenty".