653206620 has 96 divisors (see below), whose sum is σ = 2003533056. Its totient is φ = 157696000.

The previous prime is 653206607. The next prime is 653206627. The reversal of 653206620 is 26602356.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653206627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167695 + ... + 171545.

It is an arithmetic number, because the mean of its divisors is an integer number (20870136).

Almost surely, 2^653206620 is an apocalyptic number.

653206620 is a gapful number since it is divisible by the number (60) 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 653206620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1001766528).

653206620 is an abundant number, since it is smaller than the sum of its proper divisors (1350326436).

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

653206620 is a wasteful number, since it uses less digits than its factorization.

653206620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 653206620 is about 25557.9071913175. The cubic root of 653206620 is about 867.6612306801.

Adding to 653206620 its reverse (26602356), we get a palindrome (679808976).

The spelling of 653206620 in words is "six hundred fifty-three million, two hundred six thousand, six hundred twenty".