850639980 has 24 divisors (see below), whose sum is σ = 2381792112. Its totient is φ = 226837312.

The previous prime is 850639943. The next prime is 850640053. The reversal of 850639980 is 89936058.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7088607 + ... + 7088726.

It is an arithmetic number, because the mean of its divisors is an integer number (99241338).

Almost surely, 2^850639980 is an apocalyptic number.

It is an amenable number.

850639980 is an abundant number, since it is smaller than the sum of its proper divisors (1531152132).

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

850639980 is a wasteful number, since it uses less digits than its factorization.

850639980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177345 (or 14177343 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 850639980 is about 29165.7329755314. The cubic root of 850639980 is about 947.5059158692.

The spelling of 850639980 in words is "eight hundred fifty million, six hundred thirty-nine thousand, nine hundred eighty".