684345088 has 144 divisors (see below), whose sum is σ = 1640955904. Its totient is φ = 278691840.

The previous prime is 684345083. The next prime is 684345089. The reversal of 684345088 is 880543486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684345083) 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, 5388481 + ... + 5388607.

Almost surely, 2^684345088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684345088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820477952).

684345088 is an abundant number, since it is smaller than the sum of its proper divisors (956610816).

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

684345088 is a wasteful number, since it uses less digits than its factorization.

684345088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 46.

The square root of 684345088 is about 26159.9902140654. The cubic root of 684345088 is about 881.2349603053.

The spelling of 684345088 in words is "six hundred eighty-four million, three hundred forty-five thousand, eighty-eight".