685787454 has 24 divisors (see below), whose sum is σ = 1620952632. Its totient is φ = 207814320.

The previous prime is 685787449. The next prime is 685787483. The reversal of 685787454 is 454787586.

685787454 is a `hidden beast` number, since 68 + 57 + 87 + 454 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 685787454.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1731589 + ... + 1731984.

It is an arithmetic number, because the mean of its divisors is an integer number (67539693).

Almost surely, 2^685787454 is an apocalyptic number.

685787454 is an abundant number, since it is smaller than the sum of its proper divisors (935165178).

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

685787454 is a wasteful number, since it uses less digits than its factorization.

685787454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463592 (or 3463589 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The square root of 685787454 is about 26187.5438710850. The cubic root of 685787454 is about 881.8536400825.

The spelling of 685787454 in words is "six hundred eighty-five million, seven hundred eighty-seven thousand, four hundred fifty-four".