685401376 has 96 divisors (see below), whose sum is σ = 1592462592. Its totient is φ = 286863360.

The previous prime is 685401373. The next prime is 685401389. The reversal of 685401376 is 673104586.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (685401373) 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, 280030 + ... + 282466.

It is an arithmetic number, because the mean of its divisors is an integer number (16588152).

Almost surely, 2^685401376 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 685401376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796231296).

685401376 is an abundant number, since it is smaller than the sum of its proper divisors (907061216).

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

685401376 is a wasteful number, since it uses less digits than its factorization.

685401376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522 (or 2514 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 685401376 is about 26180.1714280102. The cubic root of 685401376 is about 881.6881232020.

The spelling of 685401376 in words is "six hundred eighty-five million, four hundred one thousand, three hundred seventy-six".