240285981 has 8 divisors (see below), whose sum is σ = 345026080. Its totient is φ = 147868272.

The previous prime is 240285979. The next prime is 240286003. The reversal of 240285981 is 189582042.

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

It is not a de Polignac number, because 240285981 - 2¹ = 240285979 is a prime.

It is a super-2 number, since 2×240285981² = 115474705330264722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 6161179 = 240285981 / (2 + 4 + 0 + 2 + 8 + 5 + 9 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240285931) 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, 3080551 + ... + 3080628.

It is an arithmetic number, because the mean of its divisors is an integer number (43128260).

Almost surely, 2^240285981 is an apocalyptic number.

It is an amenable number.

240285981 is a deficient number, since it is larger than the sum of its proper divisors (104740099).

240285981 is a wasteful number, since it uses less digits than its factorization.

240285981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6161195.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 240285981 is about 15501.1606339654. The cubic root of 240285981 is about 621.6932391743.

The spelling of 240285981 in words is "two hundred forty million, two hundred eighty-five thousand, nine hundred eighty-one".