1685383870 has 8 divisors (see below), whose sum is σ = 3033690984. Its totient is φ = 674153544.

The previous prime is 1685383837. The next prime is 1685383877. The reversal of 1685383870 is 783835861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685383877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84269184 + ... + 84269203.

It is an arithmetic number, because the mean of its divisors is an integer number (379211373).

Almost surely, 2^1685383870 is an apocalyptic number.

1685383870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1685383870 is a deficient number, since it is larger than the sum of its proper divisors (1348307114).

1685383870 is a wasteful number, since it uses less digits than its factorization.

1685383870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168538394.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 1685383870 is about 41053.4270189469. The cubic root of 1685383870 is about 1190.0529294067.

The spelling of 1685383870 in words is "one billion, six hundred eighty-five million, three hundred eighty-three thousand, eight hundred seventy".