240978993 has 8 divisors (see below), whose sum is σ = 325372800. Its totient is φ = 158618928.

The previous prime is 240978979. The next prime is 240979001. The reversal of 240978993 is 399879042.

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

It is not a de Polignac number, because 240978993 - 2⁴ = 240978977 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (240978193) 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, 508158 + ... + 508631.

It is an arithmetic number, because the mean of its divisors is an integer number (40671600).

Almost surely, 2^240978993 is an apocalyptic number.

It is an amenable number.

240978993 is a deficient number, since it is larger than the sum of its proper divisors (84393807).

240978993 is a wasteful number, since it uses less digits than its factorization.

240978993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016871.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 240978993 is about 15523.4980916029. The cubic root of 240978993 is about 622.2903434217.

The spelling of 240978993 in words is "two hundred forty million, nine hundred seventy-eight thousand, nine hundred ninety-three".