1440107730 has 48 divisors (see below), whose sum is σ = 3823956864. Its totient is φ = 375856800.

The previous prime is 1440107707. The next prime is 1440107743. The reversal of 1440107730 is 377010441.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1440107694 and 1440107703.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165996 + ... + 174455.

It is an arithmetic number, because the mean of its divisors is an integer number (79665768).

Almost surely, 2^1440107730 is an apocalyptic number.

1440107730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1440107730 is an abundant number, since it is smaller than the sum of its proper divisors (2383849134).

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

1440107730 is a wasteful number, since it uses less digits than its factorization.

1440107730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340511 (or 340508 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 1440107730 is about 37948.7513628578. The cubic root of 1440107730 is about 1129.2713944582.

The spelling of 1440107730 in words is "one billion, four hundred forty million, one hundred seven thousand, seven hundred thirty".