1680357238 has 16 divisors (see below), whose sum is σ = 2881199520. Its totient is φ = 720006336.

The previous prime is 1680357223. The next prime is 1680357247. The reversal of 1680357238 is 8327530861.

It is a junction number, because it is equal to n+sod(n) for n = 1680357194 and 1680357203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86268 + ... + 103936.

It is an arithmetic number, because the mean of its divisors is an integer number (180074970).

Almost surely, 2^1680357238 is an apocalyptic number.

1680357238 is a deficient number, since it is larger than the sum of its proper divisors (1200842282).

1680357238 is a wasteful number, since it uses less digits than its factorization.

1680357238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24471.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 1680357238 is about 40992.1606895758. The cubic root of 1680357238 is about 1188.8686462789.

The spelling of 1680357238 in words is "one billion, six hundred eighty million, three hundred fifty-seven thousand, two hundred thirty-eight".