1440240745 has 8 divisors (see below), whose sum is σ = 1728497160. Its totient is φ = 1152053760.

The previous prime is 1440240727. The next prime is 1440240827. The reversal of 1440240745 is 5470420441.

It can be written as a sum of positive squares in 4 ways, for example, as 93644329 + 1346596416 = 9677^2 + 36696^2 .

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

It is not a de Polignac number, because 1440240745 - 2⁷ = 1440240617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58155 + ... + 79135.

It is an arithmetic number, because the mean of its divisors is an integer number (216062145).

Almost surely, 2^1440240745 is an apocalyptic number.

It is an amenable number.

1440240745 is a deficient number, since it is larger than the sum of its proper divisors (288256415).

1440240745 is a wasteful number, since it uses less digits than its factorization.

1440240745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34715.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 1440240745 is about 37950.5038833478. The cubic root of 1440240745 is about 1129.3061616280.

The spelling of 1440240745 in words is "one billion, four hundred forty million, two hundred forty thousand, seven hundred forty-five".