855435040 has 96 divisors (see below), whose sum is σ = 2111417280. Its totient is φ = 327097344.

The previous prime is 855435023. The next prime is 855435047. The reversal of 855435040 is 40534558.

It is a junction number, because it is equal to n+sod(n) for n = 855434987 and 855435005.

It is not an unprimeable number, because it can be changed into a prime (855435047) 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, 495619 + ... + 497341.

It is an arithmetic number, because the mean of its divisors is an integer number (21993930).

Almost surely, 2^855435040 is an apocalyptic number.

855435040 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 855435040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055708640).

855435040 is an abundant number, since it is smaller than the sum of its proper divisors (1255982240).

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

855435040 is a wasteful number, since it uses less digits than its factorization.

855435040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 855435040 is about 29247.8211154267. The cubic root of 855435040 is about 949.2829455189.

Adding to 855435040 its reverse (40534558), we get a palindrome (895969598).

The spelling of 855435040 in words is "eight hundred fifty-five million, four hundred thirty-five thousand, forty".