1440829897 has 8 divisors (see below), whose sum is σ = 1552307400. Its totient is φ = 1329444480.

The previous prime is 1440829879. The next prime is 1440829927. The reversal of 1440829897 is 7989280441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 402443721 + 1038386176 = 20061^2 + 32224^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1440829897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440829807) 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, 11397 + ... + 54877.

It is an arithmetic number, because the mean of its divisors is an integer number (194038425).

Almost surely, 2^1440829897 is an apocalyptic number.

It is an amenable number.

1440829897 is a deficient number, since it is larger than the sum of its proper divisors (111477503).

1440829897 is a wasteful number, since it uses less digits than its factorization.

1440829897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46043.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 1440829897 is about 37958.2652000852. The cubic root of 1440829897 is about 1129.4601271566.

The spelling of 1440829897 in words is "one billion, four hundred forty million, eight hundred twenty-nine thousand, eight hundred ninety-seven".