1440299368 has 8 divisors (see below), whose sum is σ = 2700561330. Its totient is φ = 720149680.

The previous prime is 1440299303. The next prime is 1440299387. The reversal of 1440299368 is 8639920441.

It can be written as a sum of positive squares in only one way, i.e., 782992324 + 657307044 = 27982^2 + 25638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1440299368² = 4148924538922398848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90018703 + ... + 90018718.

Almost surely, 2^1440299368 is an apocalyptic number.

It is an amenable number.

1440299368 is a deficient number, since it is larger than the sum of its proper divisors (1260261962).

1440299368 is a wasteful number, since it uses less digits than its factorization.

1440299368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180037427 (or 180037423 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1440299368 is about 37951.2762367750. The cubic root of 1440299368 is about 1129.3214836999.

The spelling of 1440299368 in words is "one billion, four hundred forty million, two hundred ninety-nine thousand, three hundred sixty-eight".