240394661 has 8 divisors (see below), whose sum is σ = 265884024. Its totient is φ = 215904960.

The previous prime is 240394579. The next prime is 240394667. The reversal of 240394661 is 166493042.

It can be written as a sum of positive squares in 4 ways, for example, as 42120100 + 198274561 = 6490^2 + 14081^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 240394661 - 2²⁶ = 173285797 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 (240394667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249410 + ... + 250371.

It is an arithmetic number, because the mean of its divisors is an integer number (33235503).

Almost surely, 2^240394661 is an apocalyptic number.

It is an amenable number.

240394661 is a deficient number, since it is larger than the sum of its proper divisors (25489363).

240394661 is a wasteful number, since it uses less digits than its factorization.

240394661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499831.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 240394661 is about 15504.6657816284. The cubic root of 240394661 is about 621.7869545005.

The spelling of 240394661 in words is "two hundred forty million, three hundred ninety-four thousand, six hundred sixty-one".