240040557 has 16 divisors (see below), whose sum is σ = 356287680. Its totient is φ = 159724656.

The previous prime is 240040553. The next prime is 240040583. The reversal of 240040557 is 755040042.

It is not a de Polignac number, because 240040557 - 2² = 240040553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 240040557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240040553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6643 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (22267980).

Almost surely, 2^240040557 is an apocalyptic number.

240040557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

240040557 is a deficient number, since it is larger than the sum of its proper divisors (116247123).

240040557 is a wasteful number, since it uses less digits than its factorization.

240040557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16809 (or 16803 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 240040557 is about 15493.2423010808. The cubic root of 240040557 is about 621.4815047827.

Adding to 240040557 its reverse (755040042), we get a palindrome (995080599).

The spelling of 240040557 in words is "two hundred forty million, forty thousand, five hundred fifty-seven".