648949930 has 8 divisors (see below), whose sum is σ = 1168109892. Its totient is φ = 259579968.

The previous prime is 648949901. The next prime is 648949949. The reversal of 648949930 is 39949846.

It can be written as a sum of positive squares in 2 ways, for example, as 645820569 + 3129361 = 25413^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×648949930² = 842272023294009800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32447487 + ... + 32447506.

Almost surely, 2^648949930 is an apocalyptic number.

648949930 is a deficient number, since it is larger than the sum of its proper divisors (519159962).

648949930 is a wasteful number, since it uses less digits than its factorization.

648949930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64895000.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 648949930 is about 25474.4956770492. The cubic root of 648949930 is about 865.7723863865.

The spelling of 648949930 in words is "six hundred forty-eight million, nine hundred forty-nine thousand, nine hundred thirty".