42394240 has 64 divisors (see below), whose sum is σ = 115839360. Its totient is φ = 14533632.

The previous prime is 42394237. The next prime is 42394283. The reversal of 42394240 is 4249324.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 42394199 and 42394208.

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, 252 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (1809990).

Almost surely, 2^42394240 is an apocalyptic number.

42394240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42394240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57919680).

42394240 is an abundant number, since it is smaller than the sum of its proper divisors (73445120).

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

42394240 is an equidigital number, since it uses as much as digits as its factorization.

42394240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489 (or 9477 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 42394240 is about 6511.0859309335. The cubic root of 42394240 is about 348.6868892279.

The spelling of 42394240 in words is "forty-two million, three hundred ninety-four thousand, two hundred forty".