648718828 has 6 divisors (see below), whose sum is σ = 1135257956. Its totient is φ = 324359412.

The previous prime is 648718783. The next prime is 648718853. The reversal of 648718828 is 828817846.

It is a happy number.

It is a super-2 number, since 2×648718828² = 841672235603387168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81089850 + ... + 81089857.

Almost surely, 2^648718828 is an apocalyptic number.

It is an amenable number.

648718828 is a deficient number, since it is larger than the sum of its proper divisors (486539128).

648718828 is a wasteful number, since it uses less digits than its factorization.

648718828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162179711 (or 162179709 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 52.

The square root of 648718828 is about 25469.9593246632. The cubic root of 648718828 is about 865.6696021417.

The spelling of 648718828 in words is "six hundred forty-eight million, seven hundred eighteen thousand, eight hundred twenty-eight".