857628 has 30 divisors (see below), whose sum is σ = 2242856. Its totient is φ = 285768.

The previous prime is 857581. The next prime is 857629. The reversal of 857628 is 826758.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 8 + 5 + 6⁴ + 7⁷ + 2¹⁵ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 857592 and 857601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857629) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1000 + ... + 1647.

2⁸⁵⁷⁶²⁸ is an apocalyptic number.

It is an amenable number.

857628 is an abundant number, since it is smaller than the sum of its proper divisors (1385228).

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

857628 is a wasteful number, since it uses less digits than its factorization.

857628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663 (or 2652 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 857628 is about 926.0820697973. The cubic root of 857628 is about 95.0093434947.

It can be divided in two parts, 857 and 628, that added together give a triangular number (1485 = T₅₄).

The spelling of 857628 in words is "eight hundred fifty-seven thousand, six hundred twenty-eight".