1680220407 has 8 divisors (see below), whose sum is σ = 2358204160. Its totient is φ = 1061191800.

The previous prime is 1680220397. The next prime is 1680220433. The reversal of 1680220407 is 7040220861.

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

It is not a de Polignac number, because 1680220407 - 2¹⁴ = 1680204023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680221407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14738719 + ... + 14738832.

It is an arithmetic number, because the mean of its divisors is an integer number (294775520).

Almost surely, 2^1680220407 is an apocalyptic number.

1680220407 is a deficient number, since it is larger than the sum of its proper divisors (677983753).

1680220407 is a wasteful number, since it uses less digits than its factorization.

1680220407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29477573.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 1680220407 is about 40990.4916657510. The cubic root of 1680220407 is about 1188.8363756605.

The spelling of 1680220407 in words is "one billion, six hundred eighty million, two hundred twenty thousand, four hundred seven".