840985600 has 396 divisors, whose sum is σ = 2707837104. Its totient is φ = 252149760.

The previous prime is 840985553. The next prime is 840985601. The reversal of 840985600 is 6589048.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (840985601) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44262391 + ... + 44262409.

Almost surely, 2^840985600 is an apocalyptic number.

840985600 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 840985600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353918552).

840985600 is an abundant number, since it is smaller than the sum of its proper divisors (1866851504).

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

840985600 is a wasteful number, since it uses less digits than its factorization.

840985600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 840985600 is about 28999.7517230751. The cubic root of 840985600 is about 943.9076803331.

It can be divided in two parts, 84098 and 5600, that added together give a palindrome (89698).

The spelling of 840985600 in words is "eight hundred forty million, nine hundred eighty-five thousand, six hundred".