240823861 has 16 divisors (see below), whose sum is σ = 252720064. Its totient is φ = 229267584.

The previous prime is 240823831. The next prime is 240823867. The reversal of 240823861 is 168328042.

It is a cyclic number.

It is not a de Polignac number, because 240823861 - 2⁷ = 240823733 is a prime.

It is a super-2 number, since 2×240823861² = 115992264053894642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240823867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439990 + ... + 440536.

It is an arithmetic number, because the mean of its divisors is an integer number (15795004).

Almost surely, 2^240823861 is an apocalyptic number.

It is an amenable number.

240823861 is a deficient number, since it is larger than the sum of its proper divisors (11896203).

240823861 is a wasteful number, since it uses less digits than its factorization.

240823861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 240823861 is about 15518.5006041177. The cubic root of 240823861 is about 622.1567800942.

The spelling of 240823861 in words is "two hundred forty million, eight hundred twenty-three thousand, eight hundred sixty-one".