648895620 has 24 divisors (see below), whose sum is σ = 1816907904. Its totient is φ = 173038816.

The previous prime is 648895579. The next prime is 648895631. The reversal of 648895620 is 26598846.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 648895620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5407404 + ... + 5407523.

It is an arithmetic number, because the mean of its divisors is an integer number (75704496).

Almost surely, 2^648895620 is an apocalyptic number.

648895620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648895620 is an abundant number, since it is smaller than the sum of its proper divisors (1168012284).

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

648895620 is a wasteful number, since it uses less digits than its factorization.

648895620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10814939 (or 10814937 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 648895620 is about 25473.4296866362. The cubic root of 648895620 is about 865.7482338246.

The spelling of 648895620 in words is "six hundred forty-eight million, eight hundred ninety-five thousand, six hundred twenty".