805250000 has 70 divisors (see below), whose sum is σ = 1950795342. Its totient is φ = 322000000.

The previous prime is 805249957. The next prime is 805250009. The reversal of 805250000 is 52508.

It can be written as a sum of positive squares in 7 ways, for example, as 795465616 + 9784384 = 28204^2 + 3128^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805250009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 248390 + ... + 251610.

Almost surely, 2^805250000 is an apocalyptic number.

805250000 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 805250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975397671).

805250000 is an abundant number, since it is smaller than the sum of its proper divisors (1145545342).

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

805250000 is an frugal number, since it uses more digits than its factorization.

805250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259 (or 3228 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 805250000 is about 28376.9272473254. The cubic root of 805250000 is about 930.3440358165.

The spelling of 805250000 in words is "eight hundred five million, two hundred fifty thousand".