1445340020 has 18 divisors (see below), whose sum is σ = 3035571126. Its totient is φ = 578068000.

The previous prime is 1445339977. The next prime is 1445340031. The reversal of 1445340020 is 200435441.

It can be written as a sum of positive squares in 3 ways, for example, as 41938576 + 1403401444 = 6476^2 + 37462^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165770 + ... + 174270.

Almost surely, 2^1445340020 is an apocalyptic number.

1445340020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445340020 is an abundant number, since it is smaller than the sum of its proper divisors (1590231106).

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

1445340020 is an frugal number, since it uses more digits than its factorization.

1445340020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17011 (or 8508 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 1445340020 is about 38017.6277534514. The cubic root of 1445340020 is about 1130.6373880773.

Adding to 1445340020 its reverse (200435441), we get a palindrome (1645775461).

The spelling of 1445340020 in words is "one billion, four hundred forty-five million, three hundred forty thousand, twenty".