845000000 has 168 divisors, whose sum is σ = 2269623096. Its totient is φ = 312000000.

The previous prime is 844999997. The next prime is 845000003. The reversal of 845000000 is 548.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (844999997) and next prime (845000003).

It can be written as a sum of positive squares in 12 ways, for example, as 69488896 + 775511104 = 8336^2 + 27848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845000003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64999994 + ... + 65000006.

Almost surely, 2^845000000 is an apocalyptic number.

845000000 is a gapful number since it is divisible by the number (80) 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 845000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1134811548).

845000000 is an abundant number, since it is smaller than the sum of its proper divisors (1424623096).

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

845000000 is an frugal number, since it uses more digits than its factorization.

845000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 845000000 is about 29068.8837074973. The cubic root of 845000000 is about 945.4071945983.

Adding to 845000000 its reverse (548), we get a palindrome (845000548).

The spelling of 845000000 in words is "eight hundred forty-five million", and thus it is an aban number.