1445911140 has 48 divisors (see below), whose sum is σ = 4051978560. Its totient is φ = 385249920.

The previous prime is 1445911133. The next prime is 1445911141. The reversal of 1445911140 is 411195441.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1445911098 and 1445911107.

It is not an unprimeable number, because it can be changed into a prime (1445911141) 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, 65970 + ... + 85110.

It is an arithmetic number, because the mean of its divisors is an integer number (84416220).

Almost surely, 2^1445911140 is an apocalyptic number.

1445911140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445911140 is an abundant number, since it is smaller than the sum of its proper divisors (2606067420).

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

1445911140 is a wasteful number, since it uses less digits than its factorization.

1445911140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20412 (or 20410 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1445911140 is about 38025.1382640484. The cubic root of 1445911140 is about 1130.7862906613.

The spelling of 1445911140 in words is "one billion, four hundred forty-five million, nine hundred eleven thousand, one hundred forty".