684445476 has 96 divisors (see below), whose sum is σ = 1888524288. Its totient is φ = 190200960.

The previous prime is 684445451. The next prime is 684445507. The reversal of 684445476 is 674544486.

684445476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278485 + ... + 280931.

It is an arithmetic number, because the mean of its divisors is an integer number (19672128).

Almost surely, 2^684445476 is an apocalyptic number.

684445476 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684445476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944262144).

684445476 is an abundant number, since it is smaller than the sum of its proper divisors (1204078812).

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

684445476 is a wasteful number, since it uses less digits than its factorization.

684445476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641 (or 2639 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 48.

The square root of 684445476 is about 26161.9088753095. The cubic root of 684445476 is about 881.2780482597.

It can be divided in two parts, 68444 and 5476, that added together give a triangular number (73920 = T₃₈₄).

The spelling of 684445476 in words is "six hundred eighty-four million, four hundred forty-five thousand, four hundred seventy-six".