84020723644 has 48 divisors (see below), whose sum is σ = 178314264576. Its totient is φ = 34116235200.

The previous prime is 84020723623. The next prime is 84020723701. The reversal of 84020723644 is 44632702048.

It is a super-2 number, since 2×84020723644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84020723597 and 84020723606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2351452 + ... + 2386915.

It is an arithmetic number, because the mean of its divisors is an integer number (3714880512).

Almost surely, 2^84020723644 is an apocalyptic number.

It is an amenable number.

84020723644 is an abundant number, since it is smaller than the sum of its proper divisors (94293540932).

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

84020723644 is a wasteful number, since it uses less digits than its factorization.

84020723644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738426 (or 4738424 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 84020723644 in words is "eighty-four billion, twenty million, seven hundred twenty-three thousand, six hundred forty-four".