850400080 has 20 divisors (see below), whose sum is σ = 1977180372. Its totient is φ = 340160000.

The previous prime is 850400069. The next prime is 850400101. The reversal of 850400080 is 80004058.

It can be written as a sum of positive squares in 2 ways, for example, as 669981456 + 180418624 = 25884^2 + 13432^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5314921 + ... + 5315080.

Almost surely, 2^850400080 is an apocalyptic number.

850400080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

850400080 is an abundant number, since it is smaller than the sum of its proper divisors (1126780292).

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

850400080 is a wasteful number, since it uses less digits than its factorization.

850400080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10630014 (or 10630008 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 850400080 is about 29161.6199824358. The cubic root of 850400080 is about 947.4168346885.

The spelling of 850400080 in words is "eight hundred fifty million, four hundred thousand, eighty".