240221040 has 40 divisors (see below), whose sum is σ = 744685968. Its totient is φ = 64058880.

The previous prime is 240221021. The next prime is 240221071. The reversal of 240221040 is 40122042.

240221040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×240221040² = 115412296117363200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 500221 + ... + 500700.

Almost surely, 2^240221040 is an apocalyptic number.

240221040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

240221040 is an abundant number, since it is smaller than the sum of its proper divisors (504464928).

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

240221040 is a wasteful number, since it uses less digits than its factorization.

240221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000937 (or 1000931 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 240221040 is about 15499.0657782977. The cubic root of 240221040 is about 621.6372267259.

Adding to 240221040 its reverse (40122042), we get a palindrome (280343082).

The spelling of 240221040 in words is "two hundred forty million, two hundred twenty-one thousand, forty".