1628680 has 32 divisors (see below), whose sum is σ = 3859200. Its totient is φ = 616896.

The previous prime is 1628633. The next prime is 1628689. The reversal of 1628680 is 868261.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1628689) 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, 312 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (120600).

2^1628680 is an apocalyptic number.

1628680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628680 is an abundant number, since it is smaller than the sum of its proper divisors (2230520).

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

1628680 is a wasteful number, since it uses less digits than its factorization.

1628680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173 (or 2169 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1628680 is about 1276.1974768820. The cubic root of 1628680 is about 117.6554152888.

The spelling of 1628680 in words is "one million, six hundred twenty-eight thousand, six hundred eighty".