240071389 has 4 divisors (see below), whose sum is σ = 240109756. Its totient is φ = 240033024.

The previous prime is 240071387. The next prime is 240071407. The reversal of 240071389 is 983170042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983170042 = 2 ⋅491585021.

It can be written as a sum of positive squares in 2 ways, for example, as 10791225 + 229280164 = 3285^2 + 15142^2 .

It is a cyclic number.

It is not a de Polignac number, because 240071389 - 2¹ = 240071387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240071387) 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 3 ways as a sum of consecutive naturals, for example, 7374 + ... + 23119.

It is an arithmetic number, because the mean of its divisors is an integer number (60027439).

Almost surely, 2^240071389 is an apocalyptic number.

It is an amenable number.

240071389 is a deficient number, since it is larger than the sum of its proper divisors (38367).

240071389 is an equidigital number, since it uses as much as digits as its factorization.

240071389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38366.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 240071389 is about 15494.2372835839. The cubic root of 240071389 is about 621.5081123661.

The spelling of 240071389 in words is "two hundred forty million, seventy-one thousand, three hundred eighty-nine".