1685232080 has 80 divisors (see below), whose sum is σ = 4672629504. Its totient is φ = 552668160.

The previous prime is 1685232053. The next prime is 1685232089. The reversal of 1685232080 is 802325861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1685232080² = 5680014326922252800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1685232080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685232089) 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, 52541 + ... + 78300.

Almost surely, 2^1685232080 is an apocalyptic number.

1685232080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685232080 is an abundant number, since it is smaller than the sum of its proper divisors (2987397424).

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

1685232080 is a wasteful number, since it uses less digits than its factorization.

1685232080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130884 (or 130878 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1685232080 is about 41051.5782887820. The cubic root of 1685232080 is about 1190.0172019263.

The spelling of 1685232080 in words is "one billion, six hundred eighty-five million, two hundred thirty-two thousand, eighty".