1445213340 has 384 divisors, whose sum is σ = 5025484800. Its totient is φ = 347680512.

The previous prime is 1445213311. The next prime is 1445213389. The reversal of 1445213340 is 433125441.

It is a happy number.

1445213340 is a `hidden beast` number, since 1 + 445 + 213 + 3 + 4 + 0 = 666.

It is a super-2 number, since 2×1445213340² = 4177283196227911200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30749197 + ... + 30749243.

It is an arithmetic number, because the mean of its divisors is an integer number (13087200).

Almost surely, 2^1445213340 is an apocalyptic number.

1445213340 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 1445213340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2512742400).

1445213340 is an abundant number, since it is smaller than the sum of its proper divisors (3580271460).

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

1445213340 is a wasteful number, since it uses less digits than its factorization.

1445213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1445213340 is about 38015.9616477079. The cubic root of 1445213340 is about 1130.6043547132.

Adding to 1445213340 its reverse (433125441), we get a palindrome (1878338781).

The spelling of 1445213340 in words is "one billion, four hundred forty-five million, two hundred thirteen thousand, three hundred forty".