1628280 has 48 divisors (see below), whose sum is σ = 5293080. Its totient is φ = 434112.

The previous prime is 1628279. The next prime is 1628293. The reversal of 1628280 is 828261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1902 + ... + 2621.

2^1628280 is an apocalyptic number.

1628280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1628280 is an abundant number, since it is smaller than the sum of its proper divisors (3664800).

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

1628280 is a wasteful number, since it uses less digits than its factorization.

1628280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4533 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1628280 is about 1276.0407517004. The cubic root of 1628280 is about 117.6457825352.

The spelling of 1628280 in words is "one million, six hundred twenty-eight thousand, two hundred eighty".