1452636809 has 8 divisors (see below), whose sum is σ = 1578223752. Its totient is φ = 1329027840.

The previous prime is 1452636799. The next prime is 1452636839. The reversal of 1452636809 is 9086362541.

It can be written as a sum of positive squares in 4 ways, for example, as 2550409 + 1450086400 = 1597^2 + 38080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1452636809 is a prime.

It is a super-2 number, since 2×1452636809² = 4220307397723404962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1452636809.

It is not an unprimeable number, because it can be changed into a prime (1452636839) 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, 492962 + ... + 495899.

It is an arithmetic number, because the mean of its divisors is an integer number (197277969).

Almost surely, 2^1452636809 is an apocalyptic number.

It is an amenable number.

1452636809 is a deficient number, since it is larger than the sum of its proper divisors (125586943).

1452636809 is a wasteful number, since it uses less digits than its factorization.

1452636809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988987.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1452636809 is about 38113.4728016223. The cubic root of 1452636809 is about 1132.5368668060.

The spelling of 1452636809 in words is "one billion, four hundred fifty-two million, six hundred thirty-six thousand, eight hundred nine".