685672042 has 8 divisors (see below), whose sum is σ = 1122008832. Its totient is φ = 311669100.

The previous prime is 685672007. The next prime is 685672079. The reversal of 685672042 is 240276586.

685672042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×685672042² = 940292298360899528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685671986 and 685672004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15583434 + ... + 15583477.

It is an arithmetic number, because the mean of its divisors is an integer number (140251104).

Almost surely, 2^685672042 is an apocalyptic number.

685672042 is a deficient number, since it is larger than the sum of its proper divisors (436336790).

685672042 is a wasteful number, since it uses less digits than its factorization.

685672042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31166924.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 685672042 is about 26185.3402116528. The cubic root of 685672042 is about 881.8041679019.

The spelling of 685672042 in words is "six hundred eighty-five million, six hundred seventy-two thousand, forty-two".