851338880 has 64 divisors (see below), whose sum is σ = 2325991680. Its totient is φ = 291886080.

The previous prime is 851338879. The next prime is 851338889. The reversal of 851338880 is 88833158.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (851338889) 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, 90536 + ... + 99495.

It is an arithmetic number, because the mean of its divisors is an integer number (36343620).

Almost surely, 2^851338880 is an apocalyptic number.

851338880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

851338880 is an abundant number, since it is smaller than the sum of its proper divisors (1474652800).

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

851338880 is a wasteful number, since it uses less digits than its factorization.

851338880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190057 (or 190045 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 851338880 is about 29177.7120418994. The cubic root of 851338880 is about 947.7653403893.

The spelling of 851338880 in words is "eight hundred fifty-one million, three hundred thirty-eight thousand, eight hundred eighty".