857025440 has 24 divisors (see below), whose sum is σ = 2024722980. Its totient is φ = 342810112.

The previous prime is 857025439. The next prime is 857025461. The reversal of 857025440 is 44520758.

It can be written as a sum of positive squares in 2 ways, for example, as 689167504 + 167857936 = 26252^2 + 12956^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 857025440.

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 3 ways as a sum of consecutive naturals, for example, 2678045 + ... + 2678364.

Almost surely, 2^857025440 is an apocalyptic number.

857025440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

857025440 is an abundant number, since it is smaller than the sum of its proper divisors (1167697540).

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

857025440 is a wasteful number, since it uses less digits than its factorization.

857025440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356424 (or 5356416 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 857025440 is about 29274.9968403073. The cubic root of 857025440 is about 949.8708744166.

The spelling of 857025440 in words is "eight hundred fifty-seven million, twenty-five thousand, four hundred forty".