1680072 has 16 divisors (see below), whose sum is σ = 4200240. Its totient is φ = 560016.

The previous prime is 1680071. The next prime is 1680079. The reversal of 1680072 is 2700861.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 70003 = 1680072 / (1 + 6 + 8 + 0 + 0 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (1680071) 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, 34978 + ... + 35025.

It is an arithmetic number, because the mean of its divisors is an integer number (262515).

2^1680072 is an apocalyptic number.

1680072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1680072 is an abundant number, since it is smaller than the sum of its proper divisors (2520168).

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

1680072 is a wasteful number, since it uses less digits than its factorization.

1680072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70012 (or 70008 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1680072 is about 1296.1759139870. The cubic root of 1680072 is about 118.8801372944.

The spelling of 1680072 in words is "one million, six hundred eighty thousand, seventy-two".