1445452340 has 24 divisors (see below), whose sum is σ = 3085213992. Its totient is φ = 568702080.

The previous prime is 1445452331. The next prime is 1445452343. The reversal of 1445452340 is 432545441.

It can be written as a sum of positive squares in 4 ways, for example, as 141086884 + 1304365456 = 11878^2 + 36116^2 .

It is a super-2 number, since 2×1445452340² = 4178664934422951200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1445452297 and 1445452306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445452343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591179 + ... + 593618.

It is an arithmetic number, because the mean of its divisors is an integer number (128550583).

Almost surely, 2^1445452340 is an apocalyptic number.

1445452340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445452340 is an abundant number, since it is smaller than the sum of its proper divisors (1639761652).

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

1445452340 is a wasteful number, since it uses less digits than its factorization.

1445452340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184867 (or 1184865 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 1445452340 is about 38019.1049342301. The cubic root of 1445452340 is about 1130.6666752808. Note that the first 4 decimals are identical.

Adding to 1445452340 its reverse (432545441), we get a palindrome (1877997781).

The spelling of 1445452340 in words is "one billion, four hundred forty-five million, four hundred fifty-two thousand, three hundred forty".