1445244640 has 96 divisors (see below), whose sum is σ = 3918124224. Its totient is φ = 493486080.

The previous prime is 1445244623. The next prime is 1445244649. The reversal of 1445244640 is 464425441.

It is a junction number, because it is equal to n+sod(n) for n = 1445244596 and 1445244605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445244649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285330 + ... + 290350.

It is an arithmetic number, because the mean of its divisors is an integer number (40813794).

Almost surely, 2^1445244640 is an apocalyptic number.

1445244640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445244640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959062112).

1445244640 is an abundant number, since it is smaller than the sum of its proper divisors (2472879584).

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

1445244640 is a wasteful number, since it uses less digits than its factorization.

1445244640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300 (or 5292 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 34.

The square root of 1445244640 is about 38016.3733146654. The cubic root of 1445244640 is about 1130.6125167518.

The spelling of 1445244640 in words is "one billion, four hundred forty-five million, two hundred forty-four thousand, six hundred forty".