1680634 has 8 divisors (see below), whose sum is σ = 2602368. Its totient is φ = 813180.

The previous prime is 1680617. The next prime is 1680643. The reversal of 1680634 is 4360861.

1680634 = T₁₀₅₇ + T₁₀₅₈ + T₁₀₅₉.

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

It is a d-powerful number, because it can be written as 1 + 6³ + 8 + 0 + 6⁸ + 3⁶ + 4³ .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13492 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (325296).

2^1680634 is an apocalyptic number.

1680634 is the 1059-th centered triangular number.

1680634 is a deficient number, since it is larger than the sum of its proper divisors (921734).

1680634 is a wasteful number, since it uses less digits than its factorization.

1680634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27140.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1680634 is about 1296.3926874215. The cubic root of 1680634 is about 118.8933913274.

The spelling of 1680634 in words is "one million, six hundred eighty thousand, six hundred thirty-four".