684981948 has 48 divisors (see below), whose sum is σ = 1865493504. Its totient is φ = 191544000.

The previous prime is 684981923. The next prime is 684981961. The reversal of 684981948 is 849189486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82803 + ... + 90698.

It is an arithmetic number, because the mean of its divisors is an integer number (38864448).

Almost surely, 2^684981948 is an apocalyptic number.

It is an amenable number.

684981948 is an abundant number, since it is smaller than the sum of its proper divisors (1180511556).

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

684981948 is a wasteful number, since it uses less digits than its factorization.

684981948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173562 (or 173560 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 57.

The square root of 684981948 is about 26172.1597885998. The cubic root of 684981948 is about 881.5082382674.

The spelling of 684981948 in words is "six hundred eighty-four million, nine hundred eighty-one thousand, nine hundred forty-eight".