1440197485 has 4 divisors (see below), whose sum is σ = 1728236988. Its totient is φ = 1152157984.

The previous prime is 1440197467. The next prime is 1440197501. The reversal of 1440197485 is 5847910441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5847910441 = 397 ⋅14730253.

It can be written as a sum of positive squares in 2 ways, for example, as 796763529 + 643433956 = 28227^2 + 25366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440197485 - 2⁷ = 1440197357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144019744 + ... + 144019753.

It is an arithmetic number, because the mean of its divisors is an integer number (432059247).

Almost surely, 2^1440197485 is an apocalyptic number.

It is an amenable number.

1440197485 is a deficient number, since it is larger than the sum of its proper divisors (288039503).

1440197485 is an equidigital number, since it uses as much as digits as its factorization.

1440197485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288039502.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 1440197485 is about 37949.9339261612. The cubic root of 1440197485 is about 1129.2948546587.

The spelling of 1440197485 in words is "one billion, four hundred forty million, one hundred ninety-seven thousand, four hundred eighty-five".