685048478 has 16 divisors (see below), whose sum is σ = 1064495616. Its totient is φ = 330295320.

The previous prime is 685048471. The next prime is 685048487. The reversal of 685048478 is 874840586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685048471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976 + ... + 37067.

It is an arithmetic number, because the mean of its divisors is an integer number (66530976).

Almost surely, 2^685048478 is an apocalyptic number.

685048478 is a deficient number, since it is larger than the sum of its proper divisors (379447138).

685048478 is a wasteful number, since it uses less digits than its factorization.

685048478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39359.

The product of its (nonzero) digits is 1720320, while the sum is 50.

The square root of 685048478 is about 26173.4307648042. The cubic root of 685048478 is about 881.5367766567.

The spelling of 685048478 in words is "six hundred eighty-five million, forty-eight thousand, four hundred seventy-eight".