840623616 has 480 divisors, whose sum is σ = 3106810080. Its totient is φ = 222953472.

The previous prime is 840623603. The next prime is 840623617. The reversal of 840623616 is 616326048.

840623616 is a `hidden beast` number, since 8 + 406 + 236 + 16 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840623617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11515356 + ... + 11515428.

It is an arithmetic number, because the mean of its divisors is an integer number (6472521).

Almost surely, 2^840623616 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 840623616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553405040).

840623616 is an abundant number, since it is smaller than the sum of its proper divisors (2266186464).

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

840623616 is a wasteful number, since it uses less digits than its factorization.

840623616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 840623616 is about 28993.5098944574. The cubic root of 840623616 is about 943.7722327058.

It can be divided in two parts, 84062 and 3616, that added together give a palindrome (87678).

The spelling of 840623616 in words is "eight hundred forty million, six hundred twenty-three thousand, six hundred sixteen".