684287946 has 32 divisors (see below), whose sum is σ = 1552999680. Its totient is φ = 223242048.

The previous prime is 684287921. The next prime is 684287963. The reversal of 684287946 is 649782486.

684287946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 684287892 and 684287901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132271 + ... + 137346.

It is an arithmetic number, because the mean of its divisors is an integer number (48531240).

Almost surely, 2^684287946 is an apocalyptic number.

684287946 is an abundant number, since it is smaller than the sum of its proper divisors (868711734).

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

684287946 is a wasteful number, since it uses less digits than its factorization.

684287946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269675 (or 269669 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 684287946 is about 26158.8980272488. The cubic root of 684287946 is about 881.2104322660.

The spelling of 684287946 in words is "six hundred eighty-four million, two hundred eighty-seven thousand, nine hundred forty-six".