648893776 has 20 divisors (see below), whose sum is σ = 1323402400. Its totient is φ = 307370592.

The previous prime is 648893771. The next prime is 648893809. The reversal of 648893776 is 677398846.

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 648893776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648893771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066956 + ... + 1067563.

It is an arithmetic number, because the mean of its divisors is an integer number (66170120).

Almost surely, 2^648893776 is an apocalyptic number.

It is an amenable number.

648893776 is an abundant number, since it is smaller than the sum of its proper divisors (674508624).

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

648893776 is a wasteful number, since it uses less digits than its factorization.

648893776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134546 (or 2134540 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 58.

The square root of 648893776 is about 25473.3934920340. The cubic root of 648893776 is about 865.7474137435.

The spelling of 648893776 in words is "six hundred forty-eight million, eight hundred ninety-three thousand, seven hundred seventy-six".