240404840 has 64 divisors (see below), whose sum is σ = 584236800. Its totient is φ = 88503552.

The previous prime is 240404839. The next prime is 240404861. The reversal of 240404840 is 48404042.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334001 + ... + 334719.

It is an arithmetic number, because the mean of its divisors is an integer number (9128700).

Almost surely, 2^240404840 is an apocalyptic number.

240404840 is a gapful number since it is divisible by the number (20) 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 240404840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292118400).

240404840 is an abundant number, since it is smaller than the sum of its proper divisors (343831960).

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

240404840 is a wasteful number, since it uses less digits than its factorization.

240404840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 240404840 is about 15504.9940341814. The cubic root of 240404840 is about 621.7957304582.

Adding to 240404840 its reverse (48404042), we get a palindrome (288808882).

The spelling of 240404840 in words is "two hundred forty million, four hundred four thousand, eight hundred forty".