1440985928 has 12 divisors (see below), whose sum is σ = 2702049945. Its totient is φ = 720439280.

The previous prime is 1440985919. The next prime is 1440985993. The reversal of 1440985928 is 8295890441.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1056120004 + 384865924 = 32498^2 + 19618^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26842.

It is a super-4 number, since 4×1440985928⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 100658 + ... + 114078.

Almost surely, 2^1440985928 is an apocalyptic number.

It is an amenable number.

1440985928 is a deficient number, since it is larger than the sum of its proper divisors (1261064017).

1440985928 is an frugal number, since it uses more digits than its factorization.

1440985928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26848 (or 13423 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 1440985928 is about 37960.3204412186. The cubic root of 1440985928 is about 1129.5008963532.

Multiplying 1440985928 by its sum of digits (50), we get a square (72049296400 = 268420²).

The spelling of 1440985928 in words is "one billion, four hundred forty million, nine hundred eighty-five thousand, nine hundred twenty-eight".