684013944 has 64 divisors (see below), whose sum is σ = 1729728000. Its totient is φ = 225396864.

The previous prime is 684013907. The next prime is 684013949. The reversal of 684013944 is 449310486.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684013949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940509 + ... + 941235.

It is an arithmetic number, because the mean of its divisors is an integer number (27027000).

Almost surely, 2^684013944 is an apocalyptic number.

It is an amenable number.

684013944 is an abundant number, since it is smaller than the sum of its proper divisors (1045714056).

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

684013944 is a wasteful number, since it uses less digits than its factorization.

684013944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 684013944 is about 26153.6602409682. The cubic root of 684013944 is about 881.0927987186.

The spelling of 684013944 in words is "six hundred eighty-four million, thirteen thousand, nine hundred forty-four".