42044240 has 40 divisors (see below), whose sum is σ = 111719040. Its totient is φ = 14414976.

The previous prime is 42044237. The next prime is 42044251. The reversal of 42044240 is 4244024.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36980 + ... + 38099.

It is an arithmetic number, because the mean of its divisors is an integer number (2792976).

Almost surely, 2^42044240 is an apocalyptic number.

42044240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42044240 is an abundant number, since it is smaller than the sum of its proper divisors (69674800).

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

42044240 is a wasteful number, since it uses less digits than its factorization.

42044240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75099 (or 75093 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 42044240 is about 6484.1529901754. The cubic root of 42044240 is about 347.7246688193.

Adding to 42044240 its reverse (4244024), we get a palindrome (46288264).

The spelling of 42044240 in words is "forty-two million, forty-four thousand, two hundred forty".