648898904 has 8 divisors (see below), whose sum is σ = 1216685460. Its totient is φ = 324449448.

The previous prime is 648898889. The next prime is 648898927. The reversal of 648898904 is 409898846.

648898904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×648898904² = 842139575224802432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648898904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40556174 + ... + 40556189.

Almost surely, 2^648898904 is an apocalyptic number.

It is an amenable number.

648898904 is a deficient number, since it is larger than the sum of its proper divisors (567786556).

648898904 is a wasteful number, since it uses less digits than its factorization.

648898904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81112369 (or 81112365 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 648898904 is about 25473.4941458764. The cubic root of 648898904 is about 865.7496943124.

The spelling of 648898904 in words is "six hundred forty-eight million, eight hundred ninety-eight thousand, nine hundred four".