1444651340 has 24 divisors (see below), whose sum is σ = 3309565392. Its totient is φ = 525327680.

The previous prime is 1444651297. The next prime is 1444651343. The reversal of 1444651340 is 431564441.

It is a junction number, because it is equal to n+sod(n) for n = 1444651297 and 1444651306.

It is not an unprimeable number, because it can be changed into a prime (1444651343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3283079 + ... + 3283518.

It is an arithmetic number, because the mean of its divisors is an integer number (137898558).

Almost surely, 2^1444651340 is an apocalyptic number.

1444651340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444651340 is an abundant number, since it is smaller than the sum of its proper divisors (1864914052).

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

1444651340 is a wasteful number, since it uses less digits than its factorization.

1444651340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566617 (or 6566615 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 1444651340 is about 38008.5692969362. The cubic root of 1444651340 is about 1130.4577830364.

The spelling of 1444651340 in words is "one billion, four hundred forty-four million, six hundred fifty-one thousand, three hundred forty".