1440107028 has 18 divisors (see below), whose sum is σ = 3640270634. Its totient is φ = 480035664.

The previous prime is 1440106991. The next prime is 1440107051. The reversal of 1440107028 is 8207010441.

It can be written as a sum of positive squares in only one way, i.e., 1437016464 + 3090564 = 37908^2 + 1758^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1440106992 and 1440107010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20001451 + ... + 20001522.

Almost surely, 2^1440107028 is an apocalyptic number.

1440107028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1440107028 is an abundant number, since it is smaller than the sum of its proper divisors (2200163606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440107028 is a wasteful number, since it uses less digits than its factorization.

1440107028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40002983 (or 40002978 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1440107028 is about 37948.7421135405. The cubic root of 1440107028 is about 1129.2712109653.

Adding to 1440107028 its reverse (8207010441), we get a palindrome (9647117469).

The spelling of 1440107028 in words is "one billion, four hundred forty million, one hundred seven thousand, twenty-eight".