685154432 has 64 divisors (see below), whose sum is σ = 1404833760. Its totient is φ = 332666880.

The previous prime is 685154411. The next prime is 685154447. The reversal of 685154432 is 234451586.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546403 + ... + 1546845.

Almost surely, 2^685154432 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 685154432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702416880).

685154432 is an abundant number, since it is smaller than the sum of its proper divisors (719679328).

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

685154432 is a wasteful number, since it uses less digits than its factorization.

685154432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 769 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The square root of 685154432 is about 26175.4547620476. The cubic root of 685154432 is about 881.5822223615.

It can be divided in two parts, 685154 and 432, that added together give a palindrome (685586).

The spelling of 685154432 in words is "six hundred eighty-five million, one hundred fifty-four thousand, four hundred thirty-two".