857240928 has 96 divisors (see below), whose sum is σ = 2586578400. Its totient is φ = 275885568.

The previous prime is 857240911. The next prime is 857240933. The reversal of 857240928 is 829042758.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7950 + ... + 42162.

It is an arithmetic number, because the mean of its divisors is an integer number (26943525).

Almost surely, 2^857240928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857240928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293289200).

857240928 is an abundant number, since it is smaller than the sum of its proper divisors (1729337472).

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

857240928 is a wasteful number, since it uses less digits than its factorization.

857240928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34261 (or 34247 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 857240928 is about 29278.6770192917. The cubic root of 857240928 is about 949.9504786744.

The spelling of 857240928 in words is "eight hundred fifty-seven million, two hundred forty thousand, nine hundred twenty-eight".