1928280 has 32 divisors (see below), whose sum is σ = 5785200. Its totient is φ = 514176.

The previous prime is 1928261. The next prime is 1928287. The reversal of 1928280 is 828291.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7915 + ... + 8154.

2^1928280 is an apocalyptic number.

1928280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1928280 is an abundant number, since it is smaller than the sum of its proper divisors (3856920).

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

1928280 is a wasteful number, since it uses less digits than its factorization.

1928280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16083 (or 16079 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1928280 is about 1388.6252194167. The cubic root of 1928280 is about 124.4677098886.

The spelling of 1928280 in words is "one million, nine hundred twenty-eight thousand, two hundred eighty".