857850740 has 48 divisors (see below), whose sum is σ = 1889228880. Its totient is φ = 326753280.

The previous prime is 857850713. The next prime is 857850743. The reversal of 857850740 is 47058758.

It can be written as a sum of positive squares in 8 ways, for example, as 108076816 + 749773924 = 10396^2 + 27382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 857850691 and 857850700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857850743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32210 + ... + 52470.

It is an arithmetic number, because the mean of its divisors is an integer number (39358935).

Almost surely, 2^857850740 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 857850740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944614440).

857850740 is an abundant number, since it is smaller than the sum of its proper divisors (1031378140).

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

857850740 is a wasteful number, since it uses less digits than its factorization.

857850740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20372 (or 20370 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 857850740 is about 29289.0890947465. The cubic root of 857850740 is about 950.1756794217.

The spelling of 857850740 in words is "eight hundred fifty-seven million, eight hundred fifty thousand, seven hundred forty".