1445199872 has 76 divisors (see below), whose sum is σ = 2988435900. Its totient is φ = 698351616.

The previous prime is 1445199863. The next prime is 1445199883. The reversal of 1445199872 is 2789915441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 736362496 + 708837376 = 27136^2 + 26624^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1445199872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9699254 + ... + 9699402.

It is an arithmetic number, because the mean of its divisors is an integer number (39321525).

Almost surely, 2^1445199872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445199872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1494217950).

1445199872 is an abundant number, since it is smaller than the sum of its proper divisors (1543236028).

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

1445199872 is an frugal number, since it uses more digits than its factorization.

1445199872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 188 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 1445199872 is about 38015.7845111738. The cubic root of 1445199872 is about 1130.6008426535.

The spelling of 1445199872 in words is "one billion, four hundred forty-five million, one hundred ninety-nine thousand, eight hundred seventy-two".