240405953 has 8 divisors (see below), whose sum is σ = 241852128. Its totient is φ = 238964544.

The previous prime is 240405923. The next prime is 240405967. The reversal of 240405953 is 359504042.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240405953 - 2¹⁶ = 240340417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240405923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154025 + ... + 155577.

It is an arithmetic number, because the mean of its divisors is an integer number (30231516).

Almost surely, 2^240405953 is an apocalyptic number.

It is an amenable number.

240405953 is a deficient number, since it is larger than the sum of its proper divisors (1446175).

240405953 is a wasteful number, since it uses less digits than its factorization.

240405953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 240405953 is about 15505.0299258015. The cubic root of 240405953 is about 621.7966900306.

Adding to 240405953 its reverse (359504042), we get a palindrome (599909995).

The spelling of 240405953 in words is "two hundred forty million, four hundred five thousand, nine hundred fifty-three".