1440154040 has 32 divisors (see below), whose sum is σ = 3489605280. Its totient is φ = 531748992.

The previous prime is 1440154021. The next prime is 1440154061. The reversal of 1440154040 is 404510441.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1440153997 and 1440154015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1384244 + ... + 1385283.

It is an arithmetic number, because the mean of its divisors is an integer number (109050165).

Almost surely, 2^1440154040 is an apocalyptic number.

1440154040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440154040 is an abundant number, since it is smaller than the sum of its proper divisors (2049451240).

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

1440154040 is a wasteful number, since it uses less digits than its factorization.

1440154040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769551 (or 2769547 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1440154040 is about 37949.3615229558. The cubic root of 1440154040 is about 1129.2834991076.

Adding to 1440154040 its reverse (404510441), we get a palindrome (1844664481).

The spelling of 1440154040 in words is "one billion, four hundred forty million, one hundred fifty-four thousand, forty".