240421140 has 72 divisors (see below), whose sum is σ = 772185960. Its totient is φ = 60340224.

The previous prime is 240421133. The next prime is 240421183. The reversal of 240421140 is 41124042.

240421140 is a `hidden beast` number, since 240 + 421 + 1 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 127509264 + 112911876 = 11292^2 + 10626^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 36225 + ... + 42344.

It is an arithmetic number, because the mean of its divisors is an integer number (10724805).

Almost surely, 2^240421140 is an apocalyptic number.

240421140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240421140 is an abundant number, since it is smaller than the sum of its proper divisors (531764820).

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

240421140 is a wasteful number, since it uses less digits than its factorization.

240421140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78601 (or 78596 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 240421140 is about 15505.5196623654. The cubic root of 240421140 is about 621.8097831998.

Adding to 240421140 its reverse (41124042), we get a palindrome (281545182).

The spelling of 240421140 in words is "two hundred forty million, four hundred twenty-one thousand, one hundred forty".