857077440 has 112 divisors (see below), whose sum is σ = 2881347552. Its totient is φ = 215105536.

The previous prime is 857077433. The next prime is 857077453. The reversal of 857077440 is 44770758.

857077440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 857077392 and 857077401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9939 + ... + 42578.

Almost surely, 2^857077440 is an apocalyptic number.

857077440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857077440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440673776).

857077440 is an abundant number, since it is smaller than the sum of its proper divisors (2024270112).

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

857077440 is a wasteful number, since it uses less digits than its factorization.

857077440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52554 (or 52544 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 857077440 is about 29275.8849567353. The cubic root of 857077440 is about 949.8900851596.

The spelling of 857077440 in words is "eight hundred fifty-seven million, seventy-seven thousand, four hundred forty".