685428488 has 32 divisors (see below), whose sum is σ = 1338876000. Its totient is φ = 328679040.

The previous prime is 685428487. The next prime is 685428493. The reversal of 685428488 is 884824586.

It is a super-2 number, since 2×685428488² = 939624424323932288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685428487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1643 + ... + 37061.

It is an arithmetic number, because the mean of its divisors is an integer number (41839875).

Almost surely, 2^685428488 is an apocalyptic number.

It is an amenable number.

685428488 is a deficient number, since it is larger than the sum of its proper divisors (653447512).

685428488 is a wasteful number, since it uses less digits than its factorization.

685428488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35525 (or 35521 counting only the distinct ones).

The product of its digits is 3932160, while the sum is 53.

The square root of 685428488 is about 26180.6892193464. The cubic root of 685428488 is about 881.6997485134.

The spelling of 685428488 in words is "six hundred eighty-five million, four hundred twenty-eight thousand, four hundred eighty-eight".