648387100 has 18 divisors (see below), whose sum is σ = 1407000224. Its totient is φ = 259354800.

The previous prime is 648387053. The next prime is 648387121. The reversal of 648387100 is 1783846.

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 648387100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3241836 + ... + 3242035.

Almost surely, 2^648387100 is an apocalyptic number.

It is an amenable number.

648387100 is an abundant number, since it is smaller than the sum of its proper divisors (758613124).

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

648387100 is a wasteful number, since it uses less digits than its factorization.

648387100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483885 (or 6483878 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 648387100 is about 25463.4463496205. The cubic root of 648387100 is about 865.5220210964.

The spelling of 648387100 in words is "six hundred forty-eight million, three hundred eighty-seven thousand, one hundred".