656425000 has 288 divisors, whose sum is σ = 1994872320. Its totient is φ = 198000000.

The previous prime is 656424949. The next prime is 656425001. The reversal of 656425000 is 524656.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 656425000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656425001) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 21174985 + ... + 21175015.

It is an arithmetic number, because the mean of its divisors is an integer number (6926640).

Almost surely, 2^656425000 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 656425000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997436160).

656425000 is an abundant number, since it is smaller than the sum of its proper divisors (1338447320).

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

656425000 is a wasteful number, since it uses less digits than its factorization.

656425000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 656425000 is about 25620.7923374747. The cubic root of 656425000 is about 869.0838993930.

Adding to 656425000 its reverse (524656), we get a palindrome (656949656).

The spelling of 656425000 in words is "six hundred fifty-six million, four hundred twenty-five thousand".