240733891 has 4 divisors (see below), whose sum is σ = 241015000. Its totient is φ = 240452784.

The previous prime is 240733873. The next prime is 240733903. The reversal of 240733891 is 198337042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198337042 = 2 ⋅99168521.

It is a cyclic number.

It is not a de Polignac number, because 240733891 - 2¹³ = 240725699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240733891.

It is not an unprimeable number, because it can be changed into a prime (240733811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139266 + ... + 140983.

It is an arithmetic number, because the mean of its divisors is an integer number (60253750).

Almost surely, 2^240733891 is an apocalyptic number.

240733891 is a deficient number, since it is larger than the sum of its proper divisors (281109).

240733891 is an equidigital number, since it uses as much as digits as its factorization.

240733891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281108.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 240733891 is about 15515.6015352290. The cubic root of 240733891 is about 622.0792927314.

The spelling of 240733891 in words is "two hundred forty million, seven hundred thirty-three thousand, eight hundred ninety-one".