646023200 has 72 divisors (see below), whose sum is σ = 1592054352. Its totient is φ = 255960320.

The previous prime is 646023197. The next prime is 646023223. The reversal of 646023200 is 2320646.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81827 + ... + 89373.

It is an arithmetic number, because the mean of its divisors is an integer number (22111866).

Almost surely, 2^646023200 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 646023200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796027176).

646023200 is an abundant number, since it is smaller than the sum of its proper divisors (946031152).

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

646023200 is a wasteful number, since it uses less digits than its factorization.

646023200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674 (or 7661 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 646023200 is about 25416.9864460758. The cubic root of 646023200 is about 864.4688955743.

Adding to 646023200 its reverse (2320646), we get a palindrome (648343846).

The spelling of 646023200 in words is "six hundred forty-six million, twenty-three thousand, two hundred".