652021636 has 72 divisors (see below), whose sum is σ = 1378944000. Its totient is φ = 268692480.

The previous prime is 652021633. The next prime is 652021649. The reversal of 652021636 is 636120256.

652021636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 652021598 and 652021607.

It is not an unprimeable number, because it can be changed into a prime (652021631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1451940 + ... + 1452388.

It is an arithmetic number, because the mean of its divisors is an integer number (19152000).

Almost surely, 2^652021636 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 652021636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689472000).

652021636 is an abundant number, since it is smaller than the sum of its proper divisors (726922364).

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

652021636 is a wasteful number, since it uses less digits than its factorization.

652021636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 652021636 is about 25534.7143316701. The cubic root of 652021636 is about 867.1362375137.

The spelling of 652021636 in words is "six hundred fifty-two million, twenty-one thousand, six hundred thirty-six".