1440306897 has 8 divisors (see below), whose sum is σ = 2003905344. Its totient is φ = 918456528.

The previous prime is 1440306871. The next prime is 1440306919. The reversal of 1440306897 is 7986030441.

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

It is not a de Polignac number, because 1440306897 - 2¹⁰ = 1440305873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440304897) 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 7 ways as a sum of consecutive naturals, for example, 10436938 + ... + 10437075.

It is an arithmetic number, because the mean of its divisors is an integer number (250488168).

Almost surely, 2^1440306897 is an apocalyptic number.

It is an amenable number.

1440306897 is a deficient number, since it is larger than the sum of its proper divisors (563598447).

1440306897 is a wasteful number, since it uses less digits than its factorization.

1440306897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20874039.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1440306897 is about 37951.3754296205. The cubic root of 1440306897 is about 1129.3234514961.

The spelling of 1440306897 in words is "one billion, four hundred forty million, three hundred six thousand, eight hundred ninety-seven".