686074272 has 48 divisors (see below), whose sum is σ = 1939482720. Its totient is φ = 211099392.

The previous prime is 686074267. The next prime is 686074273. The reversal of 686074272 is 272470686.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (686074273) 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, 273622 + ... + 276117.

It is an arithmetic number, because the mean of its divisors is an integer number (40405890).

Almost surely, 2^686074272 is an apocalyptic number.

It is an amenable number.

686074272 is an abundant number, since it is smaller than the sum of its proper divisors (1253408448).

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

686074272 is a wasteful number, since it uses less digits than its factorization.

686074272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549765 (or 549757 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 686074272 is about 26193.0195281109. The cubic root of 686074272 is about 881.9765626405.

The spelling of 686074272 in words is "six hundred eighty-six million, seventy-four thousand, two hundred seventy-two".