648691296 has 48 divisors (see below), whose sum is σ = 1857619008. Its totient is φ = 196572800.

The previous prime is 648691291. The next prime is 648691349. The reversal of 648691296 is 692196846.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648691291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306090 + ... + 308201.

It is an arithmetic number, because the mean of its divisors is an integer number (38700396).

Almost surely, 2^648691296 is an apocalyptic number.

648691296 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

648691296 is an abundant number, since it is smaller than the sum of its proper divisors (1208927712).

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

648691296 is a wasteful number, since it uses less digits than its factorization.

648691296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614315 (or 614307 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The square root of 648691296 is about 25469.4188390705. The cubic root of 648691296 is about 865.6573554632.

The spelling of 648691296 in words is "six hundred forty-eight million, six hundred ninety-one thousand, two hundred ninety-six".