1445109840 has 60 divisors (see below), whose sum is σ = 4853162964. Its totient is φ = 385362432.

The previous prime is 1445109829. The next prime is 1445109859. The reversal of 1445109840 is 489015441.

1445109840 is a `hidden beast` number, since 14 + 4 + 510 + 98 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 320983056 + 1124126784 = 17916^2 + 33528^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1445109795 and 1445109804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002829 + ... + 1004268.

Almost surely, 2^1445109840 is an apocalyptic number.

1445109840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445109840 is an abundant number, since it is smaller than the sum of its proper divisors (3408053124).

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

1445109840 is a wasteful number, since it uses less digits than its factorization.

1445109840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007116 (or 2007107 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1445109840 is about 38014.6003530223. The cubic root of 1445109840 is about 1130.5773643857.

The spelling of 1445109840 in words is "one billion, four hundred forty-five million, one hundred nine thousand, eight hundred forty".