685052280 has 96 divisors (see below), whose sum is σ = 2428835760. Its totient is φ = 166072320.

The previous prime is 685052273. The next prime is 685052311. The reversal of 685052280 is 82250586.

685052280 is a `hidden beast` number, since 6 + 8 + 50 + 522 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 82537 + ... + 90456.

Almost surely, 2^685052280 is an apocalyptic number.

685052280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685052280 is an abundant number, since it is smaller than the sum of its proper divisors (1743783480).

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

685052280 is a wasteful number, since it uses less digits than its factorization.

685052280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173021 (or 173014 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 685052280 is about 26173.5033956098. The cubic root of 685052280 is about 881.5384074885.

The spelling of 685052280 in words is "six hundred eighty-five million, fifty-two thousand, two hundred eighty".