648700836 has 24 divisors (see below), whose sum is σ = 1729869120. Its totient is φ = 185343072.

The previous prime is 648700817. The next prime is 648700847. The reversal of 648700836 is 638007846.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3861231 + ... + 3861398.

It is an arithmetic number, because the mean of its divisors is an integer number (72077880).

Almost surely, 2^648700836 is an apocalyptic number.

It is an amenable number.

648700836 is an abundant number, since it is smaller than the sum of its proper divisors (1081168284).

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

648700836 is a wasteful number, since it uses less digits than its factorization.

648700836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7722643 (or 7722641 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 648700836 is about 25469.6061218072. The cubic root of 648700836 is about 865.6615990486.

The spelling of 648700836 in words is "six hundred forty-eight million, seven hundred thousand, eight hundred thirty-six".