4242439840 has 48 divisors (see below), whose sum is σ = 10192664160. Its totient is φ = 1668209920.

The previous prime is 4242439829. The next prime is 4242439843. The reversal of 4242439840 is 489342424.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 4242439793 and 4242439802.

It is not an unprimeable number, because it can be changed into a prime (4242439843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215266 + ... + 234145.

It is an arithmetic number, because the mean of its divisors is an integer number (212347170).

Almost surely, 2^4242439840 is an apocalyptic number.

4242439840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4242439840 is an abundant number, since it is smaller than the sum of its proper divisors (5950224320).

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

4242439840 is a wasteful number, since it uses less digits than its factorization.

4242439840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449485 (or 449477 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 40.

The square root of 4242439840 is about 65134.0144624911. The cubic root of 4242439840 is about 1618.8448606177.

The spelling of 4242439840 in words is "four billion, two hundred forty-two million, four hundred thirty-nine thousand, eight hundred forty".