686672052 has 48 divisors (see below), whose sum is σ = 1749425664. Its totient is φ = 207900000.

The previous prime is 686672003. The next prime is 686672053. The reversal of 686672052 is 250276686.

686672052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 686671995 and 686672013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686672053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295977 + ... + 298287.

It is an arithmetic number, because the mean of its divisors is an integer number (36446368).

Almost surely, 2^686672052 is an apocalyptic number.

It is an amenable number.

686672052 is an abundant number, since it is smaller than the sum of its proper divisors (1062753612).

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

686672052 is a wasteful number, since it uses less digits than its factorization.

686672052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580 (or 4578 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 686672052 is about 26204.4280990828. The cubic root of 686672052 is about 882.2326451667.

The spelling of 686672052 in words is "six hundred eighty-six million, six hundred seventy-two thousand, fifty-two".